/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/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:30:05,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:30:05,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:30:05,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:30:05,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:30:05,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:30:05,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:30:05,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:30:05,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:30:05,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:30:05,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:30:05,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:30:05,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:30:05,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:30:05,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:30:05,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:30:05,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:30:05,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:30:05,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:30:05,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:30:05,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:30:05,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:30:05,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:30:05,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:30:05,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:30:05,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:30:05,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:30:05,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:30:05,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:30:05,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:30:05,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:30:05,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:30:05,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:30:05,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:30:05,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:30:05,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:30:05,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:30:05,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:30:05,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:30:05,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:30:05,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:30:05,507 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 19:30:05,528 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:30:05,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:30:05,530 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:30:05,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:30:05,530 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:30:05,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:30:05,531 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:30:05,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:30:05,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:30:05,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:30:05,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:30:05,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:30:05,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:30:05,532 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:30:05,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:30:05,532 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:30:05,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:30:05,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:30:05,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:30:05,533 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:30:05,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:30:05,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:30:05,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:30:05,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:30:05,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:30:05,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:30:05,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:30:05,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:30:05,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:30:05,535 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 19:30:05,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:30:05,844 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:30:05,848 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:30:05,849 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:30:05,850 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:30:05,851 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 19:30:05,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40d119dff/cb00ee38642046d4945b1ae6a8d5ad95/FLAG55cfb2bdb [2020-10-12 19:30:06,369 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:30:06,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 19:30:06,381 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40d119dff/cb00ee38642046d4945b1ae6a8d5ad95/FLAG55cfb2bdb [2020-10-12 19:30:06,746 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40d119dff/cb00ee38642046d4945b1ae6a8d5ad95 [2020-10-12 19:30:06,753 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:30:06,755 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:30:06,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:30:06,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:30:06,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:30:06,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:30:06" (1/1) ... [2020-10-12 19:30:06,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e827995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:30:06, skipping insertion in model container [2020-10-12 19:30:06,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:30:06" (1/1) ... [2020-10-12 19:30:06,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:30:06,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:30:07,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:30:07,108 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:30:07,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:30:07,327 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:30:07,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:30:07 WrapperNode [2020-10-12 19:30:07,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:30:07,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:30:07,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:30:07,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:30:07,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:30:07" (1/1) ... [2020-10-12 19:30:07,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:30:07" (1/1) ... [2020-10-12 19:30:07,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:30:07" (1/1) ... [2020-10-12 19:30:07,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:30:07" (1/1) ... [2020-10-12 19:30:07,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:30:07" (1/1) ... [2020-10-12 19:30:07,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:30:07" (1/1) ... [2020-10-12 19:30:07,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:30:07" (1/1) ... [2020-10-12 19:30:07,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:30:07,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:30:07,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:30:07,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:30:07,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:30:07" (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 19:30:07,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:30:07,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:30:07,479 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:30:07,480 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:30:07,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:30:07,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:30:07,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:30:07,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:30:07,480 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:30:07,481 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:30:07,481 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:30:07,481 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:30:07,481 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:30:07,481 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:30:07,481 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:30:07,482 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:30:07,482 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:30:07,482 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:30:07,482 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:30:07,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:30:07,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:30:08,241 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:30:08,242 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:30:08,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:30:08 BoogieIcfgContainer [2020-10-12 19:30:08,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:30:08,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:30:08,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:30:08,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:30:08,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:30:06" (1/3) ... [2020-10-12 19:30:08,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318c374d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:30:08, skipping insertion in model container [2020-10-12 19:30:08,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:30:07" (2/3) ... [2020-10-12 19:30:08,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318c374d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:30:08, skipping insertion in model container [2020-10-12 19:30:08,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:30:08" (3/3) ... [2020-10-12 19:30:08,259 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 19:30:08,270 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:30:08,279 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-12 19:30:08,293 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-12 19:30:08,323 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:30:08,324 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:30:08,324 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:30:08,324 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:30:08,324 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:30:08,324 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:30:08,325 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:30:08,325 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:30:08,348 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states. [2020-10-12 19:30:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 19:30:08,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:08,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:08,358 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:08,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:08,365 INFO L82 PathProgramCache]: Analyzing trace with hash -209225606, now seen corresponding path program 1 times [2020-10-12 19:30:08,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:08,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875191112] [2020-10-12 19:30:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:08,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:08,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:08,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:09,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:09,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:10,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:12,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:12,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:12,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:13,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:13,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 19:30:13,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:30:13,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 19:30:13,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:13,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:30:13,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 19:30:13,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 19:30:13,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 19:30:13,858 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-12 19:30:13,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:13,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:13,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:13,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:13,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:13,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 19:30:13,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:13,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:30:13,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:13,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:30:13,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:30:13,918 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 19:30:13,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875191112] [2020-10-12 19:30:13,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:13,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:30:13,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052912338] [2020-10-12 19:30:13,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:30:13,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:13,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:30:13,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:30:13,948 INFO L87 Difference]: Start difference. First operand 111 states. Second operand 7 states. [2020-10-12 19:30:15,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:15,004 INFO L93 Difference]: Finished difference Result 576 states and 917 transitions. [2020-10-12 19:30:15,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:30:15,006 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-10-12 19:30:15,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:15,026 INFO L225 Difference]: With dead ends: 576 [2020-10-12 19:30:15,026 INFO L226 Difference]: Without dead ends: 475 [2020-10-12 19:30:15,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:30:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-12 19:30:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 228. [2020-10-12 19:30:15,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-12 19:30:15,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 328 transitions. [2020-10-12 19:30:15,131 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 328 transitions. Word has length 51 [2020-10-12 19:30:15,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:15,132 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 328 transitions. [2020-10-12 19:30:15,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:30:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 328 transitions. [2020-10-12 19:30:15,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 19:30:15,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:15,136 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:15,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:30:15,138 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:15,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:15,139 INFO L82 PathProgramCache]: Analyzing trace with hash 37162278, now seen corresponding path program 1 times [2020-10-12 19:30:15,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:15,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038250117] [2020-10-12 19:30:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:15,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:15,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:15,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:15,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:15,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:16,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:16,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:20,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:20,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:20,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:20,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:20,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 19:30:20,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:30:20,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:30:20,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:20,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:30:20,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:30:20,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 19:30:20,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-12 19:30:20,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:20,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:20,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:20,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:20,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:20,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 19:30:20,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:20,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:30:20,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:20,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:30:20,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:20,663 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 19:30:20,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038250117] [2020-10-12 19:30:20,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:20,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:30:20,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867676738] [2020-10-12 19:30:20,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:30:20,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:20,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:30:20,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:30:20,668 INFO L87 Difference]: Start difference. First operand 228 states and 328 transitions. Second operand 11 states. [2020-10-12 19:30:20,855 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-12 19:30:23,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:23,942 INFO L93 Difference]: Finished difference Result 2140 states and 3293 transitions. [2020-10-12 19:30:23,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 19:30:23,942 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-12 19:30:23,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:23,956 INFO L225 Difference]: With dead ends: 2140 [2020-10-12 19:30:23,957 INFO L226 Difference]: Without dead ends: 1960 [2020-10-12 19:30:23,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 19:30:23,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-10-12 19:30:24,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 352. [2020-10-12 19:30:24,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-12 19:30:24,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 514 transitions. [2020-10-12 19:30:24,047 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 514 transitions. Word has length 52 [2020-10-12 19:30:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:24,048 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 514 transitions. [2020-10-12 19:30:24,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:30:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 514 transitions. [2020-10-12 19:30:24,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 19:30:24,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:24,051 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:24,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:30:24,051 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:24,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:24,052 INFO L82 PathProgramCache]: Analyzing trace with hash 859191258, now seen corresponding path program 1 times [2020-10-12 19:30:24,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:24,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026277071] [2020-10-12 19:30:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:24,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:24,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:24,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:24,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:24,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:24,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:24,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:26,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:26,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:26,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:29,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:29,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 19:30:29,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:30:29,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 19:30:29,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:29,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:30:29,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:30:29,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 19:30:29,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:29,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:29,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:29,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:29,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:29,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:29,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:30:29,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:29,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:30:29,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:29,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:30:29,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:29,532 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 19:30:29,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026277071] [2020-10-12 19:30:29,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:29,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:30:29,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545148260] [2020-10-12 19:30:29,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:30:29,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:29,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:30:29,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:30:29,535 INFO L87 Difference]: Start difference. First operand 352 states and 514 transitions. Second operand 12 states. [2020-10-12 19:30:29,716 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-12 19:30:31,925 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-12 19:30:33,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:33,404 INFO L93 Difference]: Finished difference Result 1587 states and 2371 transitions. [2020-10-12 19:30:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 19:30:33,405 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-12 19:30:33,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:33,414 INFO L225 Difference]: With dead ends: 1587 [2020-10-12 19:30:33,414 INFO L226 Difference]: Without dead ends: 1484 [2020-10-12 19:30:33,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=249, Invalid=1011, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 19:30:33,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2020-10-12 19:30:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 367. [2020-10-12 19:30:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-12 19:30:33,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 532 transitions. [2020-10-12 19:30:33,496 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 532 transitions. Word has length 53 [2020-10-12 19:30:33,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:33,498 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 532 transitions. [2020-10-12 19:30:33,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:30:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 532 transitions. [2020-10-12 19:30:33,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 19:30:33,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:33,509 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:33,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:30:33,510 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:33,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:33,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1427969577, now seen corresponding path program 1 times [2020-10-12 19:30:33,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:33,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303263743] [2020-10-12 19:30:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:33,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:33,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:33,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:33,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:33,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:33,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:34,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:36,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:36,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:36,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:38,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:38,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:38,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 19:30:38,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:30:38,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:30:38,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:38,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:30:38,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:30:38,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 19:30:38,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:39,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:39,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:39,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:39,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:39,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:39,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:30:39,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:39,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:30:39,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:39,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:30:39,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:39,227 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 19:30:39,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303263743] [2020-10-12 19:30:39,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:39,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 19:30:39,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574589154] [2020-10-12 19:30:39,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:30:39,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:39,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:30:39,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:30:39,230 INFO L87 Difference]: Start difference. First operand 367 states and 532 transitions. Second operand 15 states. [2020-10-12 19:30:39,581 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 117 [2020-10-12 19:30:40,184 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-12 19:30:40,409 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-12 19:30:40,603 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-12 19:30:43,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:43,792 INFO L93 Difference]: Finished difference Result 1651 states and 2491 transitions. [2020-10-12 19:30:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 19:30:43,793 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-12 19:30:43,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:43,801 INFO L225 Difference]: With dead ends: 1651 [2020-10-12 19:30:43,801 INFO L226 Difference]: Without dead ends: 1427 [2020-10-12 19:30:43,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 19:30:43,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2020-10-12 19:30:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 381. [2020-10-12 19:30:43,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-12 19:30:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 549 transitions. [2020-10-12 19:30:43,862 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 549 transitions. Word has length 53 [2020-10-12 19:30:43,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:43,863 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 549 transitions. [2020-10-12 19:30:43,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:30:43,863 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 549 transitions. [2020-10-12 19:30:43,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 19:30:43,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:43,864 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:43,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:30:43,865 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:43,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:43,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1891149969, now seen corresponding path program 1 times [2020-10-12 19:30:43,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:43,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938879615] [2020-10-12 19:30:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:43,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:43,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:44,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:44,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:44,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:44,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:44,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:44,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 19:30:44,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:30:44,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1118 [2020-10-12 19:30:44,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:44,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:30:44,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:30:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 19:30:44,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:45,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:45,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:45,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:45,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:45,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:45,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:30:45,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:45,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:30:45,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:45,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:30:45,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:45,132 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 19:30:45,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938879615] [2020-10-12 19:30:45,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:45,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:30:45,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631337870] [2020-10-12 19:30:45,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:30:45,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:45,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:30:45,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:30:45,134 INFO L87 Difference]: Start difference. First operand 381 states and 549 transitions. Second operand 7 states. [2020-10-12 19:30:46,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:46,335 INFO L93 Difference]: Finished difference Result 1296 states and 1948 transitions. [2020-10-12 19:30:46,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:30:46,336 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-12 19:30:46,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:46,342 INFO L225 Difference]: With dead ends: 1296 [2020-10-12 19:30:46,342 INFO L226 Difference]: Without dead ends: 1133 [2020-10-12 19:30:46,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:30:46,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2020-10-12 19:30:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 533. [2020-10-12 19:30:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-10-12 19:30:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 780 transitions. [2020-10-12 19:30:46,428 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 780 transitions. Word has length 53 [2020-10-12 19:30:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:46,428 INFO L479 AbstractCegarLoop]: Abstraction has 533 states and 780 transitions. [2020-10-12 19:30:46,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:30:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 780 transitions. [2020-10-12 19:30:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:30:46,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:46,430 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:46,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:30:46,430 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:46,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:46,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1075980755, now seen corresponding path program 1 times [2020-10-12 19:30:46,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:46,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602781442] [2020-10-12 19:30:46,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:46,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:46,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:46,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:46,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:46,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:46,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:46,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:50,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:50,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:30:50,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:30:50,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4362 [2020-10-12 19:30:50,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:50,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:30:50,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:30:50,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 19:30:50,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:51,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:51,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:51,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:51,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:51,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:51,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:30:51,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:51,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:30:51,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:51,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:30:51,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:51,391 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 19:30:51,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602781442] [2020-10-12 19:30:51,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:51,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:30:51,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307055754] [2020-10-12 19:30:51,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:30:51,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:51,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:30:51,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:30:51,394 INFO L87 Difference]: Start difference. First operand 533 states and 780 transitions. Second operand 11 states. [2020-10-12 19:30:51,580 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-12 19:30:52,008 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 155 [2020-10-12 19:30:52,335 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-12 19:30:52,493 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-12 19:30:52,631 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-12 19:30:52,831 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-12 19:30:53,059 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2020-10-12 19:30:53,281 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-10-12 19:30:53,542 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-10-12 19:30:53,696 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-12 19:30:54,595 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-12 19:30:57,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:57,124 INFO L93 Difference]: Finished difference Result 2219 states and 3358 transitions. [2020-10-12 19:30:57,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:30:57,125 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-10-12 19:30:57,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:57,134 INFO L225 Difference]: With dead ends: 2219 [2020-10-12 19:30:57,135 INFO L226 Difference]: Without dead ends: 1936 [2020-10-12 19:30:57,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2020-10-12 19:30:57,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2020-10-12 19:30:57,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 533. [2020-10-12 19:30:57,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-10-12 19:30:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 779 transitions. [2020-10-12 19:30:57,294 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 779 transitions. Word has length 54 [2020-10-12 19:30:57,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:57,294 INFO L479 AbstractCegarLoop]: Abstraction has 533 states and 779 transitions. [2020-10-12 19:30:57,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:30:57,294 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 779 transitions. [2020-10-12 19:30:57,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:30:57,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:57,295 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:57,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:30:57,296 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:57,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:57,296 INFO L82 PathProgramCache]: Analyzing trace with hash -315481810, now seen corresponding path program 1 times [2020-10-12 19:30:57,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:57,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179626183] [2020-10-12 19:30:57,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:57,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:57,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:57,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:57,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:57,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:57,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:57,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:00,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:00,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:31:00,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:31:00,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3290 [2020-10-12 19:31:00,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:00,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:31:00,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:31:00,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 19:31:00,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:01,010 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-12 19:31:01,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:01,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:01,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:01,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:01,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:01,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:31:01,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:01,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:01,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:01,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:01,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:31:01,048 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 19:31:01,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179626183] [2020-10-12 19:31:01,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:01,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:31:01,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860213667] [2020-10-12 19:31:01,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:31:01,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:01,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:31:01,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:31:01,051 INFO L87 Difference]: Start difference. First operand 533 states and 779 transitions. Second operand 12 states. [2020-10-12 19:31:01,292 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-12 19:31:03,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:03,682 INFO L93 Difference]: Finished difference Result 1779 states and 2654 transitions. [2020-10-12 19:31:03,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 19:31:03,683 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-12 19:31:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:03,690 INFO L225 Difference]: With dead ends: 1779 [2020-10-12 19:31:03,690 INFO L226 Difference]: Without dead ends: 1513 [2020-10-12 19:31:03,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 19:31:03,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2020-10-12 19:31:03,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 527. [2020-10-12 19:31:03,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2020-10-12 19:31:03,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 771 transitions. [2020-10-12 19:31:03,903 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 771 transitions. Word has length 54 [2020-10-12 19:31:03,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:03,905 INFO L479 AbstractCegarLoop]: Abstraction has 527 states and 771 transitions. [2020-10-12 19:31:03,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:31:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 771 transitions. [2020-10-12 19:31:03,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:31:03,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:03,906 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:03,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:31:03,906 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:03,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1528239460, now seen corresponding path program 1 times [2020-10-12 19:31:03,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:03,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054347446] [2020-10-12 19:31:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:03,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:03,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:03,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:04,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:04,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:04,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:04,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:04,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:05,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:05,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:07,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:07,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:31:07,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:31:07,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3444 [2020-10-12 19:31:07,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:07,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:31:07,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 19:31:07,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 19:31:07,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:07,932 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-12 19:31:07,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:07,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:07,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:07,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:07,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:07,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:31:07,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:07,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:07,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:07,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:31:07,974 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 19:31:07,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054347446] [2020-10-12 19:31:07,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:07,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 19:31:07,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611404581] [2020-10-12 19:31:07,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:31:07,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:07,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:31:07,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:31:07,983 INFO L87 Difference]: Start difference. First operand 527 states and 771 transitions. Second operand 15 states. [2020-10-12 19:31:08,434 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 110 [2020-10-12 19:31:09,117 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-12 19:31:09,265 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-10-12 19:31:09,442 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-12 19:31:12,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:12,552 INFO L93 Difference]: Finished difference Result 2146 states and 3246 transitions. [2020-10-12 19:31:12,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 19:31:12,552 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2020-10-12 19:31:12,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:12,560 INFO L225 Difference]: With dead ends: 2146 [2020-10-12 19:31:12,560 INFO L226 Difference]: Without dead ends: 1878 [2020-10-12 19:31:12,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 19:31:12,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2020-10-12 19:31:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 533. [2020-10-12 19:31:12,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-10-12 19:31:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 775 transitions. [2020-10-12 19:31:12,690 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 775 transitions. Word has length 54 [2020-10-12 19:31:12,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:12,690 INFO L479 AbstractCegarLoop]: Abstraction has 533 states and 775 transitions. [2020-10-12 19:31:12,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:31:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 775 transitions. [2020-10-12 19:31:12,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:31:12,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:12,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:12,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:31:12,692 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:12,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:12,692 INFO L82 PathProgramCache]: Analyzing trace with hash -713144116, now seen corresponding path program 1 times [2020-10-12 19:31:12,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:12,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459179965] [2020-10-12 19:31:12,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:12,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:12,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:12,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:12,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:12,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:12,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:13,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:14,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:14,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:31:14,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:31:14,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1957 [2020-10-12 19:31:14,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:14,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:31:14,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:31:14,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 19:31:14,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:15,019 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 18 [2020-10-12 19:31:15,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:15,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:15,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:15,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:15,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:15,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:31:15,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:15,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:15,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:15,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:15,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:15,229 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 19:31:15,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459179965] [2020-10-12 19:31:15,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:15,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:31:15,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254560149] [2020-10-12 19:31:15,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:31:15,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:15,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:31:15,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:31:15,231 INFO L87 Difference]: Start difference. First operand 533 states and 775 transitions. Second operand 12 states. [2020-10-12 19:31:15,452 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-12 19:31:16,113 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-12 19:31:16,288 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-12 19:31:16,970 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-12 19:31:19,646 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-12 19:31:21,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:21,384 INFO L93 Difference]: Finished difference Result 2895 states and 4374 transitions. [2020-10-12 19:31:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 19:31:21,384 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-12 19:31:21,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:21,396 INFO L225 Difference]: With dead ends: 2895 [2020-10-12 19:31:21,397 INFO L226 Difference]: Without dead ends: 2718 [2020-10-12 19:31:21,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=472, Invalid=2284, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 19:31:21,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2718 states. [2020-10-12 19:31:21,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2718 to 538. [2020-10-12 19:31:21,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2020-10-12 19:31:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 782 transitions. [2020-10-12 19:31:21,568 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 782 transitions. Word has length 54 [2020-10-12 19:31:21,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:21,568 INFO L479 AbstractCegarLoop]: Abstraction has 538 states and 782 transitions. [2020-10-12 19:31:21,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:31:21,568 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 782 transitions. [2020-10-12 19:31:21,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 19:31:21,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:21,569 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, 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 19:31:21,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:31:21,570 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:21,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:21,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1597170256, now seen corresponding path program 1 times [2020-10-12 19:31:21,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:21,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075209365] [2020-10-12 19:31:21,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:21,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:21,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:21,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:21,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:22,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:22,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 19:31:22,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:31:22,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-12 19:31:22,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:22,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:31:22,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:31:22,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 19:31:22,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:22,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:22,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:22,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:22,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:22,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:22,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:31:22,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:22,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:22,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:22,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:22,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:22,178 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 19:31:22,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075209365] [2020-10-12 19:31:22,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:22,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:31:22,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380254002] [2020-10-12 19:31:22,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:31:22,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:22,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:31:22,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:31:22,180 INFO L87 Difference]: Start difference. First operand 538 states and 782 transitions. Second operand 6 states. [2020-10-12 19:31:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:23,745 INFO L93 Difference]: Finished difference Result 2661 states and 4081 transitions. [2020-10-12 19:31:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:31:23,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-12 19:31:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:23,754 INFO L225 Difference]: With dead ends: 2661 [2020-10-12 19:31:23,754 INFO L226 Difference]: Without dead ends: 2341 [2020-10-12 19:31:23,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:31:23,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2020-10-12 19:31:24,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 925. [2020-10-12 19:31:24,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 925 states. [2020-10-12 19:31:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1363 transitions. [2020-10-12 19:31:24,045 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1363 transitions. Word has length 55 [2020-10-12 19:31:24,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:24,045 INFO L479 AbstractCegarLoop]: Abstraction has 925 states and 1363 transitions. [2020-10-12 19:31:24,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:31:24,046 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1363 transitions. [2020-10-12 19:31:24,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:31:24,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:24,055 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, 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 19:31:24,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:31:24,055 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:24,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:24,057 INFO L82 PathProgramCache]: Analyzing trace with hash 2087644740, now seen corresponding path program 1 times [2020-10-12 19:31:24,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:24,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557374660] [2020-10-12 19:31:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:24,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:24,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:24,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:24,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:26,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:26,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:31:26,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:31:26,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2595 [2020-10-12 19:31:26,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:26,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 19:31:26,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:31:26,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 19:31:26,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:26,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:26,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:26,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:26,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:26,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:26,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:31:26,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:26,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:26,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:26,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:26,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:26,985 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 19:31:26,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557374660] [2020-10-12 19:31:26,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:26,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 19:31:26,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901801157] [2020-10-12 19:31:26,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 19:31:26,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:26,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 19:31:26,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:31:26,987 INFO L87 Difference]: Start difference. First operand 925 states and 1363 transitions. Second operand 9 states. [2020-10-12 19:31:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:28,722 INFO L93 Difference]: Finished difference Result 3249 states and 4908 transitions. [2020-10-12 19:31:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:31:28,723 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-12 19:31:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:28,732 INFO L225 Difference]: With dead ends: 3249 [2020-10-12 19:31:28,732 INFO L226 Difference]: Without dead ends: 2694 [2020-10-12 19:31:28,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:31:28,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2694 states. [2020-10-12 19:31:28,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2694 to 907. [2020-10-12 19:31:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 907 states. [2020-10-12 19:31:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1334 transitions. [2020-10-12 19:31:28,984 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1334 transitions. Word has length 56 [2020-10-12 19:31:28,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:28,984 INFO L479 AbstractCegarLoop]: Abstraction has 907 states and 1334 transitions. [2020-10-12 19:31:28,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 19:31:28,984 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1334 transitions. [2020-10-12 19:31:28,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:31:28,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:28,986 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, 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 19:31:28,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:31:28,987 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:28,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1856338505, now seen corresponding path program 1 times [2020-10-12 19:31:28,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:28,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269694436] [2020-10-12 19:31:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:29,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:29,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:29,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:29,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:29,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:31:29,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:31:29,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-12 19:31:29,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:29,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:31:29,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:31:29,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 19:31:29,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:29,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:29,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:29,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:29,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:29,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:29,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:31:29,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:29,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:31:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:31:29,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:29,501 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 19:31:29,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269694436] [2020-10-12 19:31:29,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:29,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:31:29,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271257896] [2020-10-12 19:31:29,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:31:29,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:29,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:31:29,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:31:29,503 INFO L87 Difference]: Start difference. First operand 907 states and 1334 transitions. Second operand 6 states. [2020-10-12 19:31:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:30,361 INFO L93 Difference]: Finished difference Result 1258 states and 1864 transitions. [2020-10-12 19:31:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:31:30,362 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-12 19:31:30,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:30,366 INFO L225 Difference]: With dead ends: 1258 [2020-10-12 19:31:30,366 INFO L226 Difference]: Without dead ends: 698 [2020-10-12 19:31:30,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:31:30,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-10-12 19:31:30,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 693. [2020-10-12 19:31:30,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2020-10-12 19:31:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1013 transitions. [2020-10-12 19:31:30,522 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1013 transitions. Word has length 56 [2020-10-12 19:31:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:30,522 INFO L479 AbstractCegarLoop]: Abstraction has 693 states and 1013 transitions. [2020-10-12 19:31:30,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:31:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1013 transitions. [2020-10-12 19:31:30,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:31:30,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:30,524 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, 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 19:31:30,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:31:30,524 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:30,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1488246743, now seen corresponding path program 1 times [2020-10-12 19:31:30,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:30,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594179920] [2020-10-12 19:31:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:30,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:30,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:30,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:30,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:30,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:30,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:31,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:31,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:31,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:34,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:35,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:35,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:35,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:35,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:31:35,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 19:31:35,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:31:35,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:35,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:31:35,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:31:35,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:31:35,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:36,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:36,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:36,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:36,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:36,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:36,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:31:36,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:36,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:31:36,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:36,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:31:36,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:36,043 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 19:31:36,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594179920] [2020-10-12 19:31:36,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:36,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:31:36,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947499042] [2020-10-12 19:31:36,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:31:36,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:36,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:31:36,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:31:36,045 INFO L87 Difference]: Start difference. First operand 693 states and 1013 transitions. Second operand 15 states. [2020-10-12 19:31:36,443 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 116 [2020-10-12 19:31:36,730 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-12 19:31:36,974 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-12 19:31:37,111 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-12 19:31:37,274 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-12 19:31:37,478 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-12 19:31:37,643 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-12 19:31:37,940 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-12 19:31:38,073 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-10-12 19:31:38,360 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-12 19:31:38,928 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-12 19:31:39,089 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-12 19:31:41,344 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-12 19:31:42,129 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2020-10-12 19:31:42,397 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2020-10-12 19:31:45,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:45,773 INFO L93 Difference]: Finished difference Result 7411 states and 11045 transitions. [2020-10-12 19:31:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 19:31:45,773 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-10-12 19:31:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:45,805 INFO L225 Difference]: With dead ends: 7411 [2020-10-12 19:31:45,805 INFO L226 Difference]: Without dead ends: 6904 [2020-10-12 19:31:45,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=835, Invalid=3325, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 19:31:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6904 states. [2020-10-12 19:31:46,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6904 to 695. [2020-10-12 19:31:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-12 19:31:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1012 transitions. [2020-10-12 19:31:46,046 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1012 transitions. Word has length 56 [2020-10-12 19:31:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:46,046 INFO L479 AbstractCegarLoop]: Abstraction has 695 states and 1012 transitions. [2020-10-12 19:31:46,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:31:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1012 transitions. [2020-10-12 19:31:46,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:31:46,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:46,048 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, 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 19:31:46,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:31:46,048 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:46,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:46,049 INFO L82 PathProgramCache]: Analyzing trace with hash 509084422, now seen corresponding path program 1 times [2020-10-12 19:31:46,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:46,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474709613] [2020-10-12 19:31:46,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:46,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:46,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:46,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:46,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:46,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:31:46,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:31:46,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-12 19:31:46,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:46,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:31:46,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:31:46,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 19:31:46,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:46,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:46,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:46,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:46,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:46,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:46,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:31:46,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:46,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:31:46,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:46,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:31:46,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:46,558 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 19:31:46,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474709613] [2020-10-12 19:31:46,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:46,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:31:46,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838796759] [2020-10-12 19:31:46,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:31:46,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:46,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:31:46,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:31:46,560 INFO L87 Difference]: Start difference. First operand 695 states and 1012 transitions. Second operand 6 states. [2020-10-12 19:31:47,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:47,246 INFO L93 Difference]: Finished difference Result 1026 states and 1520 transitions. [2020-10-12 19:31:47,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:31:47,247 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-12 19:31:47,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:47,249 INFO L225 Difference]: With dead ends: 1026 [2020-10-12 19:31:47,249 INFO L226 Difference]: Without dead ends: 445 [2020-10-12 19:31:47,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:31:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-12 19:31:47,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 281. [2020-10-12 19:31:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-12 19:31:47,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 390 transitions. [2020-10-12 19:31:47,356 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 390 transitions. Word has length 56 [2020-10-12 19:31:47,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:47,356 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 390 transitions. [2020-10-12 19:31:47,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:31:47,356 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 390 transitions. [2020-10-12 19:31:47,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:31:47,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:47,357 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, 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 19:31:47,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:31:47,357 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:47,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:47,358 INFO L82 PathProgramCache]: Analyzing trace with hash 138741596, now seen corresponding path program 1 times [2020-10-12 19:31:47,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:47,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052107992] [2020-10-12 19:31:47,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:47,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:47,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:47,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:47,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:47,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:47,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:48,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:48,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:48,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:48,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:48,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:49,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:49,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:52,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:52,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:31:52,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 19:31:52,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:31:52,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:52,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 19:31:52,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:31:52,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 19:31:52,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:53,076 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-12 19:31:53,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:53,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:53,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:53,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:53,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:53,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:31:53,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:53,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:53,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:53,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:53,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:53,588 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 19:31:53,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052107992] [2020-10-12 19:31:53,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:53,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-10-12 19:31:53,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846790189] [2020-10-12 19:31:53,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 19:31:53,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:53,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 19:31:53,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-12 19:31:53,590 INFO L87 Difference]: Start difference. First operand 281 states and 390 transitions. Second operand 19 states. [2020-10-12 19:31:53,845 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-12 19:31:54,580 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-10-12 19:31:54,880 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 74 [2020-10-12 19:31:55,284 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 90 [2020-10-12 19:31:56,437 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-12 19:31:59,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:59,837 INFO L93 Difference]: Finished difference Result 1788 states and 2626 transitions. [2020-10-12 19:31:59,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 19:31:59,838 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2020-10-12 19:31:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:59,840 INFO L225 Difference]: With dead ends: 1788 [2020-10-12 19:31:59,840 INFO L226 Difference]: Without dead ends: 1615 [2020-10-12 19:31:59,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=313, Invalid=1579, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 19:31:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2020-10-12 19:31:59,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 289. [2020-10-12 19:31:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-12 19:31:59,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 400 transitions. [2020-10-12 19:31:59,963 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 400 transitions. Word has length 56 [2020-10-12 19:31:59,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:59,964 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 400 transitions. [2020-10-12 19:31:59,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 19:31:59,964 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 400 transitions. [2020-10-12 19:31:59,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:31:59,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:59,964 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, 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 19:31:59,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:31:59,965 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:59,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:59,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2136072761, now seen corresponding path program 1 times [2020-10-12 19:31:59,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:59,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967413328] [2020-10-12 19:31:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:59,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:59,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:00,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:00,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:00,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:00,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:01,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:03,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:03,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:04,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:04,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:32:04,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:32:04,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:32:04,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:04,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 19:32:04,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:32:04,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 19:32:04,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:05,238 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 22 [2020-10-12 19:32:05,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:05,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:05,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:05,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:05,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:05,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:32:05,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:05,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:32:05,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:05,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:32:05,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:05,582 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 19:32:05,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967413328] [2020-10-12 19:32:05,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:05,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:32:05,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889157606] [2020-10-12 19:32:05,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 19:32:05,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:05,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 19:32:05,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:32:05,585 INFO L87 Difference]: Start difference. First operand 289 states and 400 transitions. Second operand 14 states. [2020-10-12 19:32:05,784 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-12 19:32:09,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:09,228 INFO L93 Difference]: Finished difference Result 2131 states and 3162 transitions. [2020-10-12 19:32:09,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:32:09,228 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-12 19:32:09,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:09,231 INFO L225 Difference]: With dead ends: 2131 [2020-10-12 19:32:09,231 INFO L226 Difference]: Without dead ends: 1953 [2020-10-12 19:32:09,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2020-10-12 19:32:09,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2020-10-12 19:32:09,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 284. [2020-10-12 19:32:09,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-12 19:32:09,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 393 transitions. [2020-10-12 19:32:09,380 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 393 transitions. Word has length 56 [2020-10-12 19:32:09,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:09,381 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 393 transitions. [2020-10-12 19:32:09,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 19:32:09,381 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 393 transitions. [2020-10-12 19:32:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:32:09,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:09,381 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, 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 19:32:09,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:32:09,382 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:09,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:09,382 INFO L82 PathProgramCache]: Analyzing trace with hash -838110013, now seen corresponding path program 1 times [2020-10-12 19:32:09,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:09,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590019735] [2020-10-12 19:32:09,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:09,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:09,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:09,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:09,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:09,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:09,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:09,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:10,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:10,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:14,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:14,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:32:14,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:32:14,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:32:14,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:14,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 19:32:14,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:32:14,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 19:32:14,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:14,806 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 31 [2020-10-12 19:32:15,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:15,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:15,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:15,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:15,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:15,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:32:15,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:15,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:32:15,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:15,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:32:15,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:15,134 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 19:32:15,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590019735] [2020-10-12 19:32:15,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:15,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:32:15,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692215744] [2020-10-12 19:32:15,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 19:32:15,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:15,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 19:32:15,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:32:15,136 INFO L87 Difference]: Start difference. First operand 284 states and 393 transitions. Second operand 14 states. [2020-10-12 19:32:15,341 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-12 19:32:15,854 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-10-12 19:32:16,110 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-12 19:32:18,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:18,650 INFO L93 Difference]: Finished difference Result 1347 states and 1984 transitions. [2020-10-12 19:32:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 19:32:18,651 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-12 19:32:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:18,653 INFO L225 Difference]: With dead ends: 1347 [2020-10-12 19:32:18,653 INFO L226 Difference]: Without dead ends: 1166 [2020-10-12 19:32:18,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 19:32:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2020-10-12 19:32:18,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 284. [2020-10-12 19:32:18,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-12 19:32:18,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 393 transitions. [2020-10-12 19:32:18,830 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 393 transitions. Word has length 56 [2020-10-12 19:32:18,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:18,830 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 393 transitions. [2020-10-12 19:32:18,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 19:32:18,831 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 393 transitions. [2020-10-12 19:32:18,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:32:18,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:18,831 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, 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 19:32:18,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:32:18,831 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:18,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:18,832 INFO L82 PathProgramCache]: Analyzing trace with hash 615719313, now seen corresponding path program 1 times [2020-10-12 19:32:18,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:18,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107674596] [2020-10-12 19:32:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:18,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:18,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:18,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:18,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:20,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:20,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:32:20,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:32:20,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1790 [2020-10-12 19:32:20,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:32:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:32:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 19:32:20,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:20,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:20,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:20,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:20,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:20,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:20,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:32:20,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:20,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:32:20,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:20,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:32:20,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:20,990 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 19:32:20,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107674596] [2020-10-12 19:32:20,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:20,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:32:20,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528480884] [2020-10-12 19:32:20,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:32:20,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:20,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:32:20,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:32:20,992 INFO L87 Difference]: Start difference. First operand 284 states and 393 transitions. Second operand 10 states. [2020-10-12 19:32:21,146 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-12 19:32:22,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:22,130 INFO L93 Difference]: Finished difference Result 548 states and 788 transitions. [2020-10-12 19:32:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:32:22,131 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-12 19:32:22,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:22,132 INFO L225 Difference]: With dead ends: 548 [2020-10-12 19:32:22,132 INFO L226 Difference]: Without dead ends: 369 [2020-10-12 19:32:22,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:32:22,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-12 19:32:22,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 282. [2020-10-12 19:32:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-12 19:32:22,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 387 transitions. [2020-10-12 19:32:22,251 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 387 transitions. Word has length 56 [2020-10-12 19:32:22,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:22,251 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 387 transitions. [2020-10-12 19:32:22,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:32:22,251 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 387 transitions. [2020-10-12 19:32:22,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:32:22,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:22,252 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, 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 19:32:22,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:32:22,252 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:22,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1681916818, now seen corresponding path program 1 times [2020-10-12 19:32:22,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:22,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058587593] [2020-10-12 19:32:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:22,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:22,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:22,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:22,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:22,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:32:22,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:32:22,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-12 19:32:22,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:32:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:32:22,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:32:22,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:22,640 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-12 19:32:22,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:22,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:22,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:22,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:22,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:22,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:32:22,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:22,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:32:22,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:22,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:32:22,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:32:22,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058587593] [2020-10-12 19:32:22,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:22,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:32:22,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755849002] [2020-10-12 19:32:22,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:32:22,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:22,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:32:22,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:32:22,663 INFO L87 Difference]: Start difference. First operand 282 states and 387 transitions. Second operand 6 states. [2020-10-12 19:32:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:23,628 INFO L93 Difference]: Finished difference Result 680 states and 973 transitions. [2020-10-12 19:32:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:32:23,629 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-12 19:32:23,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:23,630 INFO L225 Difference]: With dead ends: 680 [2020-10-12 19:32:23,631 INFO L226 Difference]: Without dead ends: 460 [2020-10-12 19:32:23,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:32:23,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-12 19:32:23,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 455. [2020-10-12 19:32:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-12 19:32:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 649 transitions. [2020-10-12 19:32:23,952 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 649 transitions. Word has length 56 [2020-10-12 19:32:23,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:23,952 INFO L479 AbstractCegarLoop]: Abstraction has 455 states and 649 transitions. [2020-10-12 19:32:23,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:32:23,952 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 649 transitions. [2020-10-12 19:32:23,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:32:23,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:23,953 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, 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 19:32:23,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 19:32:23,953 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:23,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:23,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1895650014, now seen corresponding path program 1 times [2020-10-12 19:32:23,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:23,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645768331] [2020-10-12 19:32:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:23,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:23,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:24,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:24,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:24,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:24,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:25,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:25,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:32:25,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:32:25,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1508 [2020-10-12 19:32:25,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:25,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:32:25,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:32:25,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 19:32:25,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:25,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:25,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:25,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:25,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:25,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:25,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:32:25,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:25,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:32:25,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:25,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:32:25,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:25,838 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 19:32:25,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645768331] [2020-10-12 19:32:25,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:25,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:32:25,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643814187] [2020-10-12 19:32:25,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:32:25,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:25,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:32:25,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:32:25,840 INFO L87 Difference]: Start difference. First operand 455 states and 649 transitions. Second operand 12 states. [2020-10-12 19:32:26,017 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-12 19:32:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:29,568 INFO L93 Difference]: Finished difference Result 1867 states and 2730 transitions. [2020-10-12 19:32:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 19:32:29,569 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-12 19:32:29,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:29,572 INFO L225 Difference]: With dead ends: 1867 [2020-10-12 19:32:29,572 INFO L226 Difference]: Without dead ends: 1531 [2020-10-12 19:32:29,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=240, Invalid=816, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 19:32:29,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2020-10-12 19:32:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 452. [2020-10-12 19:32:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2020-10-12 19:32:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 645 transitions. [2020-10-12 19:32:29,877 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 645 transitions. Word has length 57 [2020-10-12 19:32:29,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:29,877 INFO L479 AbstractCegarLoop]: Abstraction has 452 states and 645 transitions. [2020-10-12 19:32:29,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:32:29,877 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 645 transitions. [2020-10-12 19:32:29,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:32:29,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:29,878 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, 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 19:32:29,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 19:32:29,879 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:29,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:29,879 INFO L82 PathProgramCache]: Analyzing trace with hash -574865492, now seen corresponding path program 1 times [2020-10-12 19:32:29,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:29,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888700336] [2020-10-12 19:32:29,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:29,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:29,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:29,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:30,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:30,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:30,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:31,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:31,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:32:31,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:32:31,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1294 [2020-10-12 19:32:31,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:31,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 19:32:31,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:32:31,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:32:31,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:31,362 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 22 [2020-10-12 19:32:31,602 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-12 19:32:31,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:31,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:31,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:31,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:31,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:31,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 19:32:31,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:31,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:32:31,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:31,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:32:31,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:32:31,647 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 19:32:31,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888700336] [2020-10-12 19:32:31,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:31,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:32:31,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155148736] [2020-10-12 19:32:31,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 19:32:31,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:31,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 19:32:31,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:32:31,651 INFO L87 Difference]: Start difference. First operand 452 states and 645 transitions. Second operand 13 states. [2020-10-12 19:32:31,902 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-12 19:32:36,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:36,809 INFO L93 Difference]: Finished difference Result 2865 states and 4205 transitions. [2020-10-12 19:32:36,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 19:32:36,810 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-12 19:32:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:36,814 INFO L225 Difference]: With dead ends: 2865 [2020-10-12 19:32:36,814 INFO L226 Difference]: Without dead ends: 2528 [2020-10-12 19:32:36,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 19:32:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2020-10-12 19:32:37,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 449. [2020-10-12 19:32:37,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-10-12 19:32:37,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 640 transitions. [2020-10-12 19:32:37,120 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 640 transitions. Word has length 57 [2020-10-12 19:32:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:37,120 INFO L479 AbstractCegarLoop]: Abstraction has 449 states and 640 transitions. [2020-10-12 19:32:37,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 19:32:37,121 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 640 transitions. [2020-10-12 19:32:37,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:32:37,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:37,121 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, 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 19:32:37,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 19:32:37,122 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:37,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:37,122 INFO L82 PathProgramCache]: Analyzing trace with hash 564294470, now seen corresponding path program 1 times [2020-10-12 19:32:37,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:37,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349580570] [2020-10-12 19:32:37,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:37,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:37,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:37,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:37,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:37,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:37,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:37,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:38,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:38,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:38,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:38,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:38,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:38,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:39,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:39,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:42,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:42,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:32:42,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 19:32:42,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:32:42,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:42,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 19:32:42,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:32:42,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:32:42,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:42,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:42,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:42,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:42,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:42,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:42,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:32:42,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:42,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:32:42,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:42,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:32:42,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:42,643 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 19:32:42,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349580570] [2020-10-12 19:32:42,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:42,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-12 19:32:42,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133518804] [2020-10-12 19:32:42,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 19:32:42,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:42,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 19:32:42,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:32:42,645 INFO L87 Difference]: Start difference. First operand 449 states and 640 transitions. Second operand 17 states. [2020-10-12 19:32:43,072 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 118 [2020-10-12 19:32:43,674 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-12 19:32:47,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:47,740 INFO L93 Difference]: Finished difference Result 2461 states and 3543 transitions. [2020-10-12 19:32:47,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 19:32:47,740 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-10-12 19:32:47,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:47,745 INFO L225 Difference]: With dead ends: 2461 [2020-10-12 19:32:47,745 INFO L226 Difference]: Without dead ends: 2130 [2020-10-12 19:32:47,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=652, Invalid=3254, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 19:32:47,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2020-10-12 19:32:48,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 449. [2020-10-12 19:32:48,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-10-12 19:32:48,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 639 transitions. [2020-10-12 19:32:48,090 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 639 transitions. Word has length 57 [2020-10-12 19:32:48,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:48,090 INFO L479 AbstractCegarLoop]: Abstraction has 449 states and 639 transitions. [2020-10-12 19:32:48,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 19:32:48,090 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 639 transitions. [2020-10-12 19:32:48,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:32:48,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:48,091 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, 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 19:32:48,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 19:32:48,091 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:48,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:48,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1543929112, now seen corresponding path program 1 times [2020-10-12 19:32:48,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:48,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467140505] [2020-10-12 19:32:48,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:48,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:48,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:48,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:48,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:48,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:48,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:49,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:49,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:32:49,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:32:49,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1492 [2020-10-12 19:32:49,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:49,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:32:49,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 19:32:49,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 19:32:49,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:49,778 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-12 19:32:49,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:49,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:49,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:49,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:49,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:49,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:32:49,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:49,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:32:49,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:49,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:32:49,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:32:49,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467140505] [2020-10-12 19:32:49,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:49,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:32:49,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134205577] [2020-10-12 19:32:49,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:32:49,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:49,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:32:49,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:32:49,985 INFO L87 Difference]: Start difference. First operand 449 states and 639 transitions. Second operand 12 states. [2020-10-12 19:32:50,342 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 114 [2020-10-12 19:32:53,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:53,166 INFO L93 Difference]: Finished difference Result 2006 states and 2956 transitions. [2020-10-12 19:32:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 19:32:53,167 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-12 19:32:53,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:53,169 INFO L225 Difference]: With dead ends: 2006 [2020-10-12 19:32:53,169 INFO L226 Difference]: Without dead ends: 1667 [2020-10-12 19:32:53,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2020-10-12 19:32:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2020-10-12 19:32:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 458. [2020-10-12 19:32:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-12 19:32:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 648 transitions. [2020-10-12 19:32:53,444 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 648 transitions. Word has length 57 [2020-10-12 19:32:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:53,444 INFO L479 AbstractCegarLoop]: Abstraction has 458 states and 648 transitions. [2020-10-12 19:32:53,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:32:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 648 transitions. [2020-10-12 19:32:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:32:53,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:53,445 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, 1, 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 19:32:53,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 19:32:53,445 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:53,445 INFO L82 PathProgramCache]: Analyzing trace with hash -268327962, now seen corresponding path program 1 times [2020-10-12 19:32:53,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:53,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396632679] [2020-10-12 19:32:53,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:53,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:53,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:53,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:53,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:53,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:55,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:55,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:32:55,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:32:55,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1701 [2020-10-12 19:32:55,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:55,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:32:55,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:32:55,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 19:32:55,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:55,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:55,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:55,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:55,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:55,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:55,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:32:55,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:55,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:32:55,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:55,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:32:55,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:55,628 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 19:32:55,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396632679] [2020-10-12 19:32:55,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:55,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:32:55,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576786258] [2020-10-12 19:32:55,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:32:55,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:55,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:32:55,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:32:55,630 INFO L87 Difference]: Start difference. First operand 458 states and 648 transitions. Second operand 15 states. [2020-10-12 19:32:56,126 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 115 [2020-10-12 19:32:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:59,354 INFO L93 Difference]: Finished difference Result 1494 states and 2188 transitions. [2020-10-12 19:32:59,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 19:32:59,355 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-10-12 19:32:59,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:59,356 INFO L225 Difference]: With dead ends: 1494 [2020-10-12 19:32:59,356 INFO L226 Difference]: Without dead ends: 1158 [2020-10-12 19:32:59,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=315, Invalid=1167, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 19:32:59,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2020-10-12 19:32:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 455. [2020-10-12 19:32:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-12 19:32:59,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 644 transitions. [2020-10-12 19:32:59,877 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 644 transitions. Word has length 58 [2020-10-12 19:32:59,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:59,877 INFO L479 AbstractCegarLoop]: Abstraction has 455 states and 644 transitions. [2020-10-12 19:32:59,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:32:59,877 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 644 transitions. [2020-10-12 19:32:59,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:32:59,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:59,878 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, 1, 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 19:32:59,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 19:32:59,878 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:59,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:59,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2103350774, now seen corresponding path program 1 times [2020-10-12 19:32:59,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:59,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112701786] [2020-10-12 19:32:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:59,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:59,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:59,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:00,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:00,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:00,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:00,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:00,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:00,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:00,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:01,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:01,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:01,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:01,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:04,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:04,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:33:04,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 19:33:04,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:33:04,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:04,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 19:33:04,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:33:04,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:33:04,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:05,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:05,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:05,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:05,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:05,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:05,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:33:05,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:05,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:33:05,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:05,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:33:05,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:05,774 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 19:33:05,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112701786] [2020-10-12 19:33:05,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:05,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-10-12 19:33:05,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903940351] [2020-10-12 19:33:05,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 19:33:05,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:05,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 19:33:05,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-12 19:33:05,776 INFO L87 Difference]: Start difference. First operand 455 states and 644 transitions. Second operand 20 states. [2020-10-12 19:33:06,100 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-12 19:33:06,752 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-12 19:33:06,959 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-12 19:33:07,175 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-12 19:33:07,433 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-12 19:33:07,591 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-12 19:33:07,767 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-12 19:33:07,946 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-12 19:33:08,248 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-10-12 19:33:10,407 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-12 19:33:12,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:12,338 INFO L93 Difference]: Finished difference Result 2222 states and 3290 transitions. [2020-10-12 19:33:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 19:33:12,339 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2020-10-12 19:33:12,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:12,341 INFO L225 Difference]: With dead ends: 2222 [2020-10-12 19:33:12,341 INFO L226 Difference]: Without dead ends: 1889 [2020-10-12 19:33:12,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=436, Invalid=1820, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 19:33:12,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2020-10-12 19:33:12,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 455. [2020-10-12 19:33:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-12 19:33:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 642 transitions. [2020-10-12 19:33:12,646 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 642 transitions. Word has length 58 [2020-10-12 19:33:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:12,646 INFO L479 AbstractCegarLoop]: Abstraction has 455 states and 642 transitions. [2020-10-12 19:33:12,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 19:33:12,646 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 642 transitions. [2020-10-12 19:33:12,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:33:12,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:12,647 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, 1, 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 19:33:12,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 19:33:12,647 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:12,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:12,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1114574671, now seen corresponding path program 1 times [2020-10-12 19:33:12,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:12,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204709011] [2020-10-12 19:33:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:12,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:12,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:12,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:12,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:13,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:13,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:33:13,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:33:13,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1055 [2020-10-12 19:33:13,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:13,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 19:33:13,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 19:33:13,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 19:33:13,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:14,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:14,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:14,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:14,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:14,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:14,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:33:14,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:14,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:14,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:14,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:14,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:14,334 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 19:33:14,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204709011] [2020-10-12 19:33:14,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:14,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-12 19:33:14,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315501245] [2020-10-12 19:33:14,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 19:33:14,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:14,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 19:33:14,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-10-12 19:33:14,336 INFO L87 Difference]: Start difference. First operand 455 states and 642 transitions. Second operand 20 states. [2020-10-12 19:33:14,619 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-12 19:33:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:18,318 INFO L93 Difference]: Finished difference Result 1810 states and 2662 transitions. [2020-10-12 19:33:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 19:33:18,319 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2020-10-12 19:33:18,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:18,321 INFO L225 Difference]: With dead ends: 1810 [2020-10-12 19:33:18,321 INFO L226 Difference]: Without dead ends: 1473 [2020-10-12 19:33:18,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 19:33:18,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2020-10-12 19:33:18,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 455. [2020-10-12 19:33:18,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-12 19:33:18,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 640 transitions. [2020-10-12 19:33:18,609 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 640 transitions. Word has length 58 [2020-10-12 19:33:18,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:18,610 INFO L479 AbstractCegarLoop]: Abstraction has 455 states and 640 transitions. [2020-10-12 19:33:18,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 19:33:18,610 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 640 transitions. [2020-10-12 19:33:18,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:33:18,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:18,610 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, 1, 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 19:33:18,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 19:33:18,610 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:18,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:18,611 INFO L82 PathProgramCache]: Analyzing trace with hash -250758735, now seen corresponding path program 1 times [2020-10-12 19:33:18,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:18,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467588417] [2020-10-12 19:33:18,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:18,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:18,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:18,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:18,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:18,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:19,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:19,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:33:19,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:33:19,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-10-12 19:33:19,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:19,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 19:33:19,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:33:19,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:33:19,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:20,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:20,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:20,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:20,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:20,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:20,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:33:20,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:20,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:33:20,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:20,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:33:20,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:20,128 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 19:33:20,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467588417] [2020-10-12 19:33:20,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:20,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 19:33:20,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009101582] [2020-10-12 19:33:20,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 19:33:20,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:20,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 19:33:20,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:33:20,130 INFO L87 Difference]: Start difference. First operand 455 states and 640 transitions. Second operand 16 states. [2020-10-12 19:33:20,360 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-12 19:33:23,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:23,104 INFO L93 Difference]: Finished difference Result 1214 states and 1771 transitions. [2020-10-12 19:33:23,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 19:33:23,105 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-10-12 19:33:23,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:23,106 INFO L225 Difference]: With dead ends: 1214 [2020-10-12 19:33:23,106 INFO L226 Difference]: Without dead ends: 883 [2020-10-12 19:33:23,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 19:33:23,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2020-10-12 19:33:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 455. [2020-10-12 19:33:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-12 19:33:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 639 transitions. [2020-10-12 19:33:23,411 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 639 transitions. Word has length 58 [2020-10-12 19:33:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:23,412 INFO L479 AbstractCegarLoop]: Abstraction has 455 states and 639 transitions. [2020-10-12 19:33:23,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 19:33:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 639 transitions. [2020-10-12 19:33:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:33:23,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:23,413 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, 1, 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 19:33:23,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 19:33:23,413 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:23,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:23,414 INFO L82 PathProgramCache]: Analyzing trace with hash 433454496, now seen corresponding path program 1 times [2020-10-12 19:33:23,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:23,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559233103] [2020-10-12 19:33:23,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:23,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:23,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:23,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:23,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:23,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:24,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:24,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:33:24,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:33:24,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1282 [2020-10-12 19:33:24,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:24,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:33:24,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:33:24,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:33:24,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:25,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:25,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:25,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:25,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:25,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:25,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:33:25,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:25,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:33:25,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:25,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:33:25,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:25,150 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 19:33:25,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559233103] [2020-10-12 19:33:25,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:25,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:33:25,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173960439] [2020-10-12 19:33:25,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:33:25,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:25,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:33:25,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:33:25,151 INFO L87 Difference]: Start difference. First operand 455 states and 639 transitions. Second operand 15 states. [2020-10-12 19:33:25,362 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-12 19:33:28,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:28,635 INFO L93 Difference]: Finished difference Result 1962 states and 2899 transitions. [2020-10-12 19:33:28,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 19:33:28,636 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-10-12 19:33:28,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:28,638 INFO L225 Difference]: With dead ends: 1962 [2020-10-12 19:33:28,638 INFO L226 Difference]: Without dead ends: 1603 [2020-10-12 19:33:28,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2020-10-12 19:33:28,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2020-10-12 19:33:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 438. [2020-10-12 19:33:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-10-12 19:33:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 619 transitions. [2020-10-12 19:33:28,948 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 619 transitions. Word has length 58 [2020-10-12 19:33:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:28,948 INFO L479 AbstractCegarLoop]: Abstraction has 438 states and 619 transitions. [2020-10-12 19:33:28,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:33:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 619 transitions. [2020-10-12 19:33:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 19:33:28,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:28,949 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, 1, 1, 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 19:33:28,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 19:33:28,949 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:28,949 INFO L82 PathProgramCache]: Analyzing trace with hash 21950731, now seen corresponding path program 1 times [2020-10-12 19:33:28,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:28,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424220115] [2020-10-12 19:33:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:28,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:28,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:29,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:29,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 19:33:29,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 19:33:29,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-12 19:33:29,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:29,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:33:29,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:33:29,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 19:33:29,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:29,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:29,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:29,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:29,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:29,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:29,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:33:29,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:29,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:29,261 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 19:33:29,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424220115] [2020-10-12 19:33:29,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:29,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:33:29,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508994983] [2020-10-12 19:33:29,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:33:29,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:29,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:33:29,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:33:29,263 INFO L87 Difference]: Start difference. First operand 438 states and 619 transitions. Second operand 6 states. [2020-10-12 19:33:29,416 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-12 19:33:30,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:30,939 INFO L93 Difference]: Finished difference Result 1421 states and 2101 transitions. [2020-10-12 19:33:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:33:30,940 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-12 19:33:30,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:30,942 INFO L225 Difference]: With dead ends: 1421 [2020-10-12 19:33:30,942 INFO L226 Difference]: Without dead ends: 1096 [2020-10-12 19:33:30,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:33:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2020-10-12 19:33:31,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 442. [2020-10-12 19:33:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-12 19:33:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 617 transitions. [2020-10-12 19:33:31,224 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 617 transitions. Word has length 59 [2020-10-12 19:33:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:31,224 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 617 transitions. [2020-10-12 19:33:31,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:33:31,225 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 617 transitions. [2020-10-12 19:33:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 19:33:31,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:31,226 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, 1, 1, 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 19:33:31,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 19:33:31,226 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:31,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:31,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1882737005, now seen corresponding path program 1 times [2020-10-12 19:33:31,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:31,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536590545] [2020-10-12 19:33:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:31,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:31,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:31,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:31,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:31,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 19:33:31,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:33:31,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 591 [2020-10-12 19:33:31,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:31,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:33:31,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:33:31,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 19:33:31,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:32,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:32,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:32,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:32,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:32,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:32,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:33:32,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:32,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:32,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:32,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:32,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:32,152 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 19:33:32,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536590545] [2020-10-12 19:33:32,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:32,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:33:32,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998806842] [2020-10-12 19:33:32,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:33:32,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:32,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:33:32,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:33:32,154 INFO L87 Difference]: Start difference. First operand 442 states and 617 transitions. Second operand 10 states. [2020-10-12 19:33:32,297 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-12 19:33:33,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:33,590 INFO L93 Difference]: Finished difference Result 932 states and 1351 transitions. [2020-10-12 19:33:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:33:33,591 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-12 19:33:33,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:33,592 INFO L225 Difference]: With dead ends: 932 [2020-10-12 19:33:33,592 INFO L226 Difference]: Without dead ends: 585 [2020-10-12 19:33:33,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-12 19:33:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-10-12 19:33:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 421. [2020-10-12 19:33:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-10-12 19:33:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 590 transitions. [2020-10-12 19:33:33,867 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 590 transitions. Word has length 59 [2020-10-12 19:33:33,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:33,867 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 590 transitions. [2020-10-12 19:33:33,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:33:33,867 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 590 transitions. [2020-10-12 19:33:33,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 19:33:33,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:33,868 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:33:33,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 19:33:33,868 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:33,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:33,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1048107880, now seen corresponding path program 1 times [2020-10-12 19:33:33,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:33,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468127710] [2020-10-12 19:33:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:33,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:33,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:33,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:33,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:34,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:34,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:34,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:34,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:34,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:35,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:35,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:35,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:38,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:38,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 19:33:38,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 19:33:38,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4142 [2020-10-12 19:33:38,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:38,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:33:38,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 19:33:38,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 19:33:38,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:38,423 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-12 19:33:38,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:38,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:38,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:38,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:38,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:38,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:33:38,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:38,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:38,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:38,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:38,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:38,460 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 19:33:38,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468127710] [2020-10-12 19:33:38,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:38,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 19:33:38,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032886522] [2020-10-12 19:33:38,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:33:38,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:38,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:33:38,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:33:38,462 INFO L87 Difference]: Start difference. First operand 421 states and 590 transitions. Second operand 15 states. [2020-10-12 19:33:38,681 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-12 19:33:42,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:42,113 INFO L93 Difference]: Finished difference Result 1941 states and 2853 transitions. [2020-10-12 19:33:42,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 19:33:42,114 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2020-10-12 19:33:42,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:42,116 INFO L225 Difference]: With dead ends: 1941 [2020-10-12 19:33:42,116 INFO L226 Difference]: Without dead ends: 1619 [2020-10-12 19:33:42,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2020-10-12 19:33:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2020-10-12 19:33:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 777. [2020-10-12 19:33:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 777 states. [2020-10-12 19:33:42,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1122 transitions. [2020-10-12 19:33:42,680 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1122 transitions. Word has length 80 [2020-10-12 19:33:42,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:42,680 INFO L479 AbstractCegarLoop]: Abstraction has 777 states and 1122 transitions. [2020-10-12 19:33:42,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:33:42,680 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1122 transitions. [2020-10-12 19:33:42,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 19:33:42,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:42,682 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:33:42,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 19:33:42,682 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:42,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:42,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1286293044, now seen corresponding path program 1 times [2020-10-12 19:33:42,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:42,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188136290] [2020-10-12 19:33:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:42,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:42,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:42,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:42,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:42,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:43,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:43,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:43,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:43,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 19:33:43,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:33:43,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-12 19:33:43,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:43,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:33:43,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-12 19:33:43,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 19:33:43,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:43,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:43,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:43,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:43,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:43,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:43,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:33:43,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:43,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:43,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:43,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:43,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:43,558 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 19:33:43,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188136290] [2020-10-12 19:33:43,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:43,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:33:43,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095217975] [2020-10-12 19:33:43,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:33:43,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:43,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:33:43,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:33:43,560 INFO L87 Difference]: Start difference. First operand 777 states and 1122 transitions. Second operand 6 states. [2020-10-12 19:33:45,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:45,884 INFO L93 Difference]: Finished difference Result 1964 states and 2855 transitions. [2020-10-12 19:33:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:33:45,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-12 19:33:45,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:45,887 INFO L225 Difference]: With dead ends: 1964 [2020-10-12 19:33:45,887 INFO L226 Difference]: Without dead ends: 1962 [2020-10-12 19:33:45,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:33:45,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2020-10-12 19:33:46,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 825. [2020-10-12 19:33:46,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 825 states. [2020-10-12 19:33:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1170 transitions. [2020-10-12 19:33:46,493 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1170 transitions. Word has length 80 [2020-10-12 19:33:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:46,494 INFO L479 AbstractCegarLoop]: Abstraction has 825 states and 1170 transitions. [2020-10-12 19:33:46,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:33:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1170 transitions. [2020-10-12 19:33:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 19:33:46,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:46,495 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:33:46,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 19:33:46,496 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:46,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:46,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1781791458, now seen corresponding path program 1 times [2020-10-12 19:33:46,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:46,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014280800] [2020-10-12 19:33:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:46,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:46,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:46,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:46,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:46,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:47,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:47,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 19:33:47,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:33:47,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 979 [2020-10-12 19:33:47,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:47,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:33:47,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 19:33:47,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 19:33:47,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:47,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:47,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:47,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:47,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:47,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:47,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:33:47,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:47,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:47,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:47,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:47,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:47,631 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 19:33:47,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014280800] [2020-10-12 19:33:47,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:47,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:33:47,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010077676] [2020-10-12 19:33:47,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:33:47,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:47,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:33:47,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:33:47,632 INFO L87 Difference]: Start difference. First operand 825 states and 1170 transitions. Second operand 6 states. [2020-10-12 19:33:49,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:49,341 INFO L93 Difference]: Finished difference Result 2223 states and 3237 transitions. [2020-10-12 19:33:49,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:33:49,341 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-12 19:33:49,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:49,343 INFO L225 Difference]: With dead ends: 2223 [2020-10-12 19:33:49,343 INFO L226 Difference]: Without dead ends: 1497 [2020-10-12 19:33:49,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:33:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2020-10-12 19:33:50,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1493. [2020-10-12 19:33:50,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1493 states. [2020-10-12 19:33:50,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2154 transitions. [2020-10-12 19:33:50,506 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2154 transitions. Word has length 80 [2020-10-12 19:33:50,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:50,506 INFO L479 AbstractCegarLoop]: Abstraction has 1493 states and 2154 transitions. [2020-10-12 19:33:50,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:33:50,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2154 transitions. [2020-10-12 19:33:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 19:33:50,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:50,509 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:33:50,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 19:33:50,509 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:50,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:50,510 INFO L82 PathProgramCache]: Analyzing trace with hash 822904814, now seen corresponding path program 1 times [2020-10-12 19:33:50,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:50,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586860066] [2020-10-12 19:33:50,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:50,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:50,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:50,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:50,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:50,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:50,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:50,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:51,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:52,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:52,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:52,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:52,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:52,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:52,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:53,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:53,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:53,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:54,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:55,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:55,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 19:33:55,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 19:33:55,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:33:55,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:55,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 19:33:55,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:33:55,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 19:33:55,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:56,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:56,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:56,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:56,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:56,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:56,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:33:56,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:56,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:33:56,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:56,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:33:56,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:56,036 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 19:33:56,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586860066] [2020-10-12 19:33:56,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:56,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-12 19:33:56,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37545808] [2020-10-12 19:33:56,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 19:33:56,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:56,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 19:33:56,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-12 19:33:56,038 INFO L87 Difference]: Start difference. First operand 1493 states and 2154 transitions. Second operand 18 states. [2020-10-12 19:33:56,175 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-12 19:33:56,579 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 124 [2020-10-12 19:33:57,580 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-12 19:33:57,773 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-12 19:33:57,982 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56