/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:24:29,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:24:29,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:24:29,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:24:29,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:24:29,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:24:29,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:24:29,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:24:29,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:24:29,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:24:29,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:24:29,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:24:29,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:24:29,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:24:29,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:24:29,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:24:29,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:24:29,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:24:29,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:24:29,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:24:29,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:24:29,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:24:29,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:24:29,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:24:29,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:24:29,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:24:29,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:24:29,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:24:29,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:24:29,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:24:29,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:24:29,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:24:29,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:24:29,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:24:29,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:24:29,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:24:29,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:24:29,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:24:29,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:24:29,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:24:29,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:24:29,395 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 [2020-10-29 13:24:29,451 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:24:29,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:24:29,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:24:29,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:24:29,457 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:24:29,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:24:29,457 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:24:29,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:24:29,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:24:29,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:24:29,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:24:29,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:24:29,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:24:29,461 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:24:29,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:24:29,462 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:24:29,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:24:29,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:24:29,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:24:29,462 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:24:29,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:24:29,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:24:29,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:24:29,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:24:29,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:24:29,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:24:29,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:24:29,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:24:29,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:24:29,464 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:24:29,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:24:29,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:24:29,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:24:29,882 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:24:29,883 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:24:29,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:24:29,970 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c9e8ad63/64a2db6929de4488849b3cf897071e0c/FLAG8280a97a7 [2020-10-29 13:24:30,684 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:24:30,685 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:24:30,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c9e8ad63/64a2db6929de4488849b3cf897071e0c/FLAG8280a97a7 [2020-10-29 13:24:31,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c9e8ad63/64a2db6929de4488849b3cf897071e0c [2020-10-29 13:24:31,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:24:31,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:24:31,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:24:31,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:24:31,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:24:31,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:24:31" (1/1) ... [2020-10-29 13:24:31,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51c7768a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:24:31, skipping insertion in model container [2020-10-29 13:24:31,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:24:31" (1/1) ... [2020-10-29 13:24:31,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:24:31,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:24:31,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:24:31,433 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:24:31,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:24:31,623 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:24:31,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:24:31 WrapperNode [2020-10-29 13:24:31,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:24:31,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:24:31,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:24:31,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:24:31,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:24:31" (1/1) ... [2020-10-29 13:24:31,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:24:31" (1/1) ... [2020-10-29 13:24:31,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:24:31" (1/1) ... [2020-10-29 13:24:31,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:24:31" (1/1) ... [2020-10-29 13:24:31,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:24:31" (1/1) ... [2020-10-29 13:24:31,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:24:31" (1/1) ... [2020-10-29 13:24:31,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:24:31" (1/1) ... [2020-10-29 13:24:31,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:24:31,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:24:31,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:24:31,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:24:31,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:24:31" (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 [2020-10-29 13:24:31,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:24:31,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:24:31,790 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:24:31,790 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:24:31,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:24:31,790 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:24:31,790 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:24:31,790 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:24:31,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:24:31,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:24:31,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:24:31,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:24:31,791 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:24:31,791 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:24:31,792 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:24:31,792 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:24:31,792 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:24:31,792 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:24:31,792 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:24:31,792 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:24:31,793 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:24:31,793 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:24:31,793 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:24:31,793 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:24:31,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:24:31,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:24:31,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:24:31,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:24:31,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:24:31,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:24:32,993 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:24:32,993 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:24:32,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:24:32 BoogieIcfgContainer [2020-10-29 13:24:32,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:24:32,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:24:32,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:24:33,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:24:33,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:24:31" (1/3) ... [2020-10-29 13:24:33,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc2a2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:24:33, skipping insertion in model container [2020-10-29 13:24:33,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:24:31" (2/3) ... [2020-10-29 13:24:33,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc2a2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:24:33, skipping insertion in model container [2020-10-29 13:24:33,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:24:32" (3/3) ... [2020-10-29 13:24:33,005 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:24:33,017 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:24:33,023 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:24:33,037 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:24:33,066 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:24:33,066 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:24:33,067 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:24:33,067 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:24:33,067 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:24:33,067 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:24:33,067 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:24:33,067 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:24:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2020-10-29 13:24:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:24:33,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:33,101 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] [2020-10-29 13:24:33,102 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:33,108 INFO L82 PathProgramCache]: Analyzing trace with hash 407883934, now seen corresponding path program 1 times [2020-10-29 13:24:33,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:33,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952474933] [2020-10-29 13:24:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:33,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:33,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:33,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:34,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:34,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:34,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:34,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:34,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:35,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:38,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:38,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:24:38,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:24:38,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 13:24:38,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:38,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:38,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:24:38,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:24:38,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:24:38,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 13:24:38,821 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:24:38,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:38,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:38,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:38,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:38,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:38,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-29 13:24:38,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:38,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:38,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:24:38,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:38,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:24:38,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:24:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:39,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952474933] [2020-10-29 13:24:39,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:39,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:24:39,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789581412] [2020-10-29 13:24:39,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:24:39,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:39,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:24:39,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:24:39,131 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 6 states. [2020-10-29 13:24:39,474 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:24:40,373 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:24:40,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:40,669 INFO L93 Difference]: Finished difference Result 335 states and 549 transitions. [2020-10-29 13:24:40,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:24:40,671 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-29 13:24:40,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:40,683 INFO L225 Difference]: With dead ends: 335 [2020-10-29 13:24:40,684 INFO L226 Difference]: Without dead ends: 218 [2020-10-29 13:24:40,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:24:40,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-29 13:24:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2020-10-29 13:24:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-29 13:24:40,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 308 transitions. [2020-10-29 13:24:40,756 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 308 transitions. Word has length 80 [2020-10-29 13:24:40,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:40,757 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 308 transitions. [2020-10-29 13:24:40,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:24:40,758 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 308 transitions. [2020-10-29 13:24:40,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:24:40,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:40,762 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, 1] [2020-10-29 13:24:40,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:24:40,762 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:40,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:40,763 INFO L82 PathProgramCache]: Analyzing trace with hash 135959317, now seen corresponding path program 1 times [2020-10-29 13:24:40,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:40,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306985237] [2020-10-29 13:24:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:40,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:40,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:40,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:40,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:41,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:41,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:41,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:41,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:41,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:44,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:44,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:45,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:45,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:45,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:45,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:24:45,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:24:45,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 13:24:45,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:45,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:45,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:24:45,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:24:45,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:24:45,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:24:46,180 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:24:46,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:46,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:46,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:46,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:46,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:46,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:24:46,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:46,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:46,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:24:46,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:46,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:24:46,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:24:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:46,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306985237] [2020-10-29 13:24:46,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:46,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:24:46,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8469220] [2020-10-29 13:24:46,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:24:46,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:46,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:24:46,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:24:46,286 INFO L87 Difference]: Start difference. First operand 215 states and 308 transitions. Second operand 6 states. [2020-10-29 13:24:46,629 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:24:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:47,423 INFO L93 Difference]: Finished difference Result 373 states and 555 transitions. [2020-10-29 13:24:47,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:24:47,428 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-29 13:24:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:47,431 INFO L225 Difference]: With dead ends: 373 [2020-10-29 13:24:47,431 INFO L226 Difference]: Without dead ends: 215 [2020-10-29 13:24:47,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:24:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-29 13:24:47,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2020-10-29 13:24:47,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-29 13:24:47,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 305 transitions. [2020-10-29 13:24:47,466 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 305 transitions. Word has length 81 [2020-10-29 13:24:47,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:47,467 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 305 transitions. [2020-10-29 13:24:47,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:24:47,467 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 305 transitions. [2020-10-29 13:24:47,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:24:47,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:47,470 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, 1, 1] [2020-10-29 13:24:47,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:24:47,470 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:47,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:47,471 INFO L82 PathProgramCache]: Analyzing trace with hash 722670639, now seen corresponding path program 1 times [2020-10-29 13:24:47,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:47,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290096034] [2020-10-29 13:24:47,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:47,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:47,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:47,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:47,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:47,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:48,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:48,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:48,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:49,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:51,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:52,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:52,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:52,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:52,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:24:52,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:24:52,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 13:24:52,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:52,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:52,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:24:52,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:24:52,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:24:52,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:52,815 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:24:52,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:52,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:52,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:52,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:52,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:52,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:24:52,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:52,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:52,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:24:52,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:52,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:24:52,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:52,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290096034] [2020-10-29 13:24:52,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:52,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:24:52,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635611676] [2020-10-29 13:24:52,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:24:52,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:52,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:24:52,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:24:52,884 INFO L87 Difference]: Start difference. First operand 215 states and 305 transitions. Second operand 6 states. [2020-10-29 13:24:53,175 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:24:53,925 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:24:54,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:54,309 INFO L93 Difference]: Finished difference Result 516 states and 769 transitions. [2020-10-29 13:24:54,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:24:54,310 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-29 13:24:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:54,316 INFO L225 Difference]: With dead ends: 516 [2020-10-29 13:24:54,316 INFO L226 Difference]: Without dead ends: 350 [2020-10-29 13:24:54,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:24:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-29 13:24:54,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 347. [2020-10-29 13:24:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2020-10-29 13:24:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 511 transitions. [2020-10-29 13:24:54,365 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 511 transitions. Word has length 82 [2020-10-29 13:24:54,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:54,366 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 511 transitions. [2020-10-29 13:24:54,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:24:54,366 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 511 transitions. [2020-10-29 13:24:54,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:24:54,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:54,369 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, 1, 1, 1] [2020-10-29 13:24:54,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:24:54,369 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:54,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:54,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1860506487, now seen corresponding path program 1 times [2020-10-29 13:24:54,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:54,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360381220] [2020-10-29 13:24:54,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:54,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:54,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:54,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:54,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:54,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:55,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:55,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:55,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:59,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:59,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:24:59,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:24:59,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:24:59,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:59,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:59,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:24:59,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:24:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:24:59,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:59,697 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 24 [2020-10-29 13:25:00,023 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:25:00,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:00,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:00,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:00,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:00,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:00,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:25:00,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:00,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:00,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:00,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:00,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:00,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:25:00,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360381220] [2020-10-29 13:25:00,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:00,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:25:00,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22609237] [2020-10-29 13:25:00,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:25:00,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:00,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:25:00,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:25:00,096 INFO L87 Difference]: Start difference. First operand 347 states and 511 transitions. Second operand 8 states. [2020-10-29 13:25:00,417 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:25:01,362 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:25:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:01,913 INFO L93 Difference]: Finished difference Result 865 states and 1323 transitions. [2020-10-29 13:25:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:25:01,914 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-29 13:25:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:01,918 INFO L225 Difference]: With dead ends: 865 [2020-10-29 13:25:01,918 INFO L226 Difference]: Without dead ends: 586 [2020-10-29 13:25:01,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:25:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-10-29 13:25:01,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 347. [2020-10-29 13:25:01,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2020-10-29 13:25:01,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 510 transitions. [2020-10-29 13:25:01,973 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 510 transitions. Word has length 83 [2020-10-29 13:25:01,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:01,973 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 510 transitions. [2020-10-29 13:25:01,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:25:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 510 transitions. [2020-10-29 13:25:01,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:25:01,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:01,976 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, 1, 1, 1, 1] [2020-10-29 13:25:01,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:25:01,976 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:01,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:01,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1639186852, now seen corresponding path program 1 times [2020-10-29 13:25:01,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:01,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9241813] [2020-10-29 13:25:01,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:02,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:02,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:02,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:02,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:02,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:02,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:06,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:06,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:06,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:06,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:07,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:07,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:25:07,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:25:07,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:25:07,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:07,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:07,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:25:07,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:25:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 13:25:07,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:07,345 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:25:07,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:07,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:07,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:07,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:07,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:07,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:25:07,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:07,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:07,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:07,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:07,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:07,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:25:07,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9241813] [2020-10-29 13:25:07,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:07,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:25:07,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749451726] [2020-10-29 13:25:07,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:25:07,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:07,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:25:07,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:25:07,413 INFO L87 Difference]: Start difference. First operand 347 states and 510 transitions. Second operand 8 states. [2020-10-29 13:25:07,738 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:25:08,609 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:25:08,916 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:25:09,201 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:25:09,512 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:25:09,967 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:25:10,275 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:25:10,586 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:25:10,930 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:25:12,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:12,374 INFO L93 Difference]: Finished difference Result 2813 states and 4386 transitions. [2020-10-29 13:25:12,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 13:25:12,378 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 84 [2020-10-29 13:25:12,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:12,393 INFO L225 Difference]: With dead ends: 2813 [2020-10-29 13:25:12,394 INFO L226 Difference]: Without dead ends: 2578 [2020-10-29 13:25:12,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-29 13:25:12,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2020-10-29 13:25:12,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 623. [2020-10-29 13:25:12,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2020-10-29 13:25:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 938 transitions. [2020-10-29 13:25:12,505 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 938 transitions. Word has length 84 [2020-10-29 13:25:12,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:12,506 INFO L481 AbstractCegarLoop]: Abstraction has 623 states and 938 transitions. [2020-10-29 13:25:12,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:25:12,506 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 938 transitions. [2020-10-29 13:25:12,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 13:25:12,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:12,508 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, 1, 1, 1, 1, 1] [2020-10-29 13:25:12,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:25:12,509 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:12,510 INFO L82 PathProgramCache]: Analyzing trace with hash 106146942, now seen corresponding path program 1 times [2020-10-29 13:25:12,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:12,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807734776] [2020-10-29 13:25:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:12,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:12,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:12,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:12,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:13,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:13,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:14,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:14,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:14,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:15,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:15,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:15,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:16,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:17,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:17,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 13:25:17,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:25:17,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:25:17,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:17,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:17,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:25:17,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:25:17,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:25:17,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:17,866 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:25:17,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:17,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:17,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:17,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:17,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:17,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:25:17,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:17,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:17,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:17,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:17,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:17,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:25:17,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807734776] [2020-10-29 13:25:17,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:17,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:25:17,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141066583] [2020-10-29 13:25:17,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:25:17,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:17,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:25:17,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:25:17,906 INFO L87 Difference]: Start difference. First operand 623 states and 938 transitions. Second operand 6 states. [2020-10-29 13:25:18,199 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:25:19,209 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:25:19,530 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:25:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:20,578 INFO L93 Difference]: Finished difference Result 4694 states and 7284 transitions. [2020-10-29 13:25:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:25:20,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-29 13:25:20,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:20,603 INFO L225 Difference]: With dead ends: 4694 [2020-10-29 13:25:20,604 INFO L226 Difference]: Without dead ends: 4183 [2020-10-29 13:25:20,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:25:20,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4183 states. [2020-10-29 13:25:20,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4183 to 2283. [2020-10-29 13:25:20,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-10-29 13:25:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3511 transitions. [2020-10-29 13:25:20,943 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3511 transitions. Word has length 85 [2020-10-29 13:25:20,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:20,943 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3511 transitions. [2020-10-29 13:25:20,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:25:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3511 transitions. [2020-10-29 13:25:20,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:25:20,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:20,951 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, 1, 1, 1, 1, 1, 1] [2020-10-29 13:25:20,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:25:20,951 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:20,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:20,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1235111314, now seen corresponding path program 1 times [2020-10-29 13:25:20,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:20,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556845816] [2020-10-29 13:25:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:21,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:21,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:21,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:21,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:21,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:21,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:21,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:21,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:22,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:23,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:23,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:24,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:24,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:25,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:25,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:25,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:25,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:25,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:25:25,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 13:25:25,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:25:25,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:25,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:25,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:25:25,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:25:25,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:25:25,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:26,271 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:25:26,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:26,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:26,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:26,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:26,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:26,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:25:26,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:26,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:26,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:26,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:26,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:26,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:25:26,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556845816] [2020-10-29 13:25:26,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:26,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:25:26,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063922948] [2020-10-29 13:25:26,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:25:26,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:26,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:25:26,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:25:26,315 INFO L87 Difference]: Start difference. First operand 2283 states and 3511 transitions. Second operand 6 states. [2020-10-29 13:25:26,588 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:25:27,832 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:25:28,117 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:25:30,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:30,482 INFO L93 Difference]: Finished difference Result 18581 states and 28868 transitions. [2020-10-29 13:25:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:25:30,482 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-29 13:25:30,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:30,570 INFO L225 Difference]: With dead ends: 18581 [2020-10-29 13:25:30,570 INFO L226 Difference]: Without dead ends: 16574 [2020-10-29 13:25:30,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:25:30,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16574 states. [2020-10-29 13:25:31,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16574 to 8667. [2020-10-29 13:25:31,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8667 states. [2020-10-29 13:25:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8667 states to 8667 states and 13387 transitions. [2020-10-29 13:25:31,877 INFO L78 Accepts]: Start accepts. Automaton has 8667 states and 13387 transitions. Word has length 86 [2020-10-29 13:25:31,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:31,878 INFO L481 AbstractCegarLoop]: Abstraction has 8667 states and 13387 transitions. [2020-10-29 13:25:31,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:25:31,878 INFO L276 IsEmpty]: Start isEmpty. Operand 8667 states and 13387 transitions. [2020-10-29 13:25:31,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:25:31,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:31,884 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, 1, 1, 1, 1, 1, 1] [2020-10-29 13:25:31,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:25:31,884 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:31,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:31,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1465013057, now seen corresponding path program 1 times [2020-10-29 13:25:31,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:31,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582378375] [2020-10-29 13:25:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:31,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:31,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:32,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:32,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:32,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:32,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:33,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:33,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:33,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:33,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:33,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:34,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:35,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:35,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:35,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:35,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:35,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:35,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:36,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:36,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:36,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:36,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:25:36,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-29 13:25:36,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:25:36,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:36,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:36,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:25:36,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:25:36,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 13:25:36,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:37,189 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 23 [2020-10-29 13:25:37,479 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:25:37,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:37,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:37,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:37,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:37,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:37,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:25:37,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:37,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:37,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:37,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:37,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:37,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:25:37,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582378375] [2020-10-29 13:25:37,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:37,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:25:37,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423563875] [2020-10-29 13:25:37,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:25:37,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:37,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:25:37,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:25:37,545 INFO L87 Difference]: Start difference. First operand 8667 states and 13387 transitions. Second operand 9 states. [2020-10-29 13:25:37,908 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:25:39,235 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:25:41,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:41,272 INFO L93 Difference]: Finished difference Result 20212 states and 31239 transitions. [2020-10-29 13:25:41,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:25:41,273 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 86 [2020-10-29 13:25:41,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:41,307 INFO L225 Difference]: With dead ends: 20212 [2020-10-29 13:25:41,307 INFO L226 Difference]: Without dead ends: 12510 [2020-10-29 13:25:41,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-29 13:25:41,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12510 states. [2020-10-29 13:25:42,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12510 to 8667. [2020-10-29 13:25:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8667 states. [2020-10-29 13:25:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8667 states to 8667 states and 13332 transitions. [2020-10-29 13:25:42,572 INFO L78 Accepts]: Start accepts. Automaton has 8667 states and 13332 transitions. Word has length 86 [2020-10-29 13:25:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:42,573 INFO L481 AbstractCegarLoop]: Abstraction has 8667 states and 13332 transitions. [2020-10-29 13:25:42,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:25:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 8667 states and 13332 transitions. [2020-10-29 13:25:42,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:25:42,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:42,579 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, 1, 1, 1, 1, 1, 1] [2020-10-29 13:25:42,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:25:42,579 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:42,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:42,580 INFO L82 PathProgramCache]: Analyzing trace with hash -490716868, now seen corresponding path program 1 times [2020-10-29 13:25:42,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:42,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180421418] [2020-10-29 13:25:42,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:42,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:42,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:42,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:42,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:43,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:43,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:47,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:47,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:25:47,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:25:47,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:25:47,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:47,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:47,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:25:47,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 13:25:47,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:25:47,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:47,939 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:25:47,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:47,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:47,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:47,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:47,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:47,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:25:47,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:47,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:47,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:47,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:47,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:47,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:25:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:25:47,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180421418] [2020-10-29 13:25:47,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:47,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:25:47,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70859269] [2020-10-29 13:25:47,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:25:47,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:47,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:25:47,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:25:47,989 INFO L87 Difference]: Start difference. First operand 8667 states and 13332 transitions. Second operand 6 states. [2020-10-29 13:25:48,289 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:25:49,169 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:25:49,565 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:25:51,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:51,784 INFO L93 Difference]: Finished difference Result 23287 states and 36082 transitions. [2020-10-29 13:25:51,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:25:51,785 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-29 13:25:51,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:51,832 INFO L225 Difference]: With dead ends: 23287 [2020-10-29 13:25:51,832 INFO L226 Difference]: Without dead ends: 15924 [2020-10-29 13:25:51,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:25:51,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15924 states. [2020-10-29 13:25:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15924 to 15918. [2020-10-29 13:25:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15918 states. [2020-10-29 13:25:54,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15918 states to 15918 states and 24492 transitions. [2020-10-29 13:25:54,070 INFO L78 Accepts]: Start accepts. Automaton has 15918 states and 24492 transitions. Word has length 86 [2020-10-29 13:25:54,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:54,070 INFO L481 AbstractCegarLoop]: Abstraction has 15918 states and 24492 transitions. [2020-10-29 13:25:54,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:25:54,070 INFO L276 IsEmpty]: Start isEmpty. Operand 15918 states and 24492 transitions. [2020-10-29 13:25:54,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 13:25:54,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:54,078 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:25:54,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:25:54,078 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:54,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:54,079 INFO L82 PathProgramCache]: Analyzing trace with hash 875111760, now seen corresponding path program 1 times [2020-10-29 13:25:54,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:54,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786283914] [2020-10-29 13:25:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:54,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:54,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:54,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:54,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:54,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:54,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:54,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:55,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:55,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:56,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:56,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:56,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:56,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:56,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:57,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:58,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:58,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:58,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:58,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:58,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:59,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:59,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:59,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 13:25:59,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-29 13:25:59,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-29 13:25:59,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:59,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:59,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:25:59,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:25:59,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 13:25:59,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:59,333 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 23 [2020-10-29 13:25:59,634 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:25:59,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:59,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:59,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:59,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:59,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:59,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:25:59,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:59,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:59,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:59,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:59,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:59,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:25:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:25:59,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786283914] [2020-10-29 13:25:59,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:59,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:25:59,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850930317] [2020-10-29 13:25:59,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:25:59,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:59,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:25:59,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:25:59,687 INFO L87 Difference]: Start difference. First operand 15918 states and 24492 transitions. Second operand 9 states. [2020-10-29 13:26:00,009 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:26:01,663 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:26:02,043 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:26:07,691 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:26:08,149 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:26:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:21,392 INFO L93 Difference]: Finished difference Result 142267 states and 216605 transitions. [2020-10-29 13:26:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 13:26:21,393 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 87 [2020-10-29 13:26:21,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:21,861 INFO L225 Difference]: With dead ends: 142267 [2020-10-29 13:26:21,862 INFO L226 Difference]: Without dead ends: 127230 [2020-10-29 13:26:21,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 13:26:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127230 states. [2020-10-29 13:26:25,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127230 to 15450. [2020-10-29 13:26:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15450 states. [2020-10-29 13:26:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15450 states to 15450 states and 23650 transitions. [2020-10-29 13:26:25,575 INFO L78 Accepts]: Start accepts. Automaton has 15450 states and 23650 transitions. Word has length 87 [2020-10-29 13:26:25,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:25,575 INFO L481 AbstractCegarLoop]: Abstraction has 15450 states and 23650 transitions. [2020-10-29 13:26:25,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:26:25,575 INFO L276 IsEmpty]: Start isEmpty. Operand 15450 states and 23650 transitions. [2020-10-29 13:26:25,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 13:26:25,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:25,585 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:26:25,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:26:25,586 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:25,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:25,586 INFO L82 PathProgramCache]: Analyzing trace with hash 361406336, now seen corresponding path program 1 times [2020-10-29 13:26:25,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:25,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185346626] [2020-10-29 13:26:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:25,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:25,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:25,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:25,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:26,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:29,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:29,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:30,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:30,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 13:26:30,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:26:30,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:26:30,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:30,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:30,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:26:30,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-29 13:26:30,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:26:30,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:30,914 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:26:30,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:30,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:30,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:30,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:30,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:30,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:26:30,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:30,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:30,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:26:30,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:30,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:26:30,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:26:30,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185346626] [2020-10-29 13:26:30,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:30,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:26:30,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935661894] [2020-10-29 13:26:30,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:26:30,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:30,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:26:30,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:26:30,957 INFO L87 Difference]: Start difference. First operand 15450 states and 23650 transitions. Second operand 6 states. [2020-10-29 13:26:31,283 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:26:32,186 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:26:32,497 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:26:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:36,569 INFO L93 Difference]: Finished difference Result 38154 states and 58479 transitions. [2020-10-29 13:26:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:26:36,569 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-29 13:26:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:36,610 INFO L225 Difference]: With dead ends: 38154 [2020-10-29 13:26:36,610 INFO L226 Difference]: Without dead ends: 23815 [2020-10-29 13:26:36,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:26:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23815 states. [2020-10-29 13:26:40,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23815 to 22785. [2020-10-29 13:26:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22785 states. [2020-10-29 13:26:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22785 states to 22785 states and 34985 transitions. [2020-10-29 13:26:40,950 INFO L78 Accepts]: Start accepts. Automaton has 22785 states and 34985 transitions. Word has length 87 [2020-10-29 13:26:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:40,950 INFO L481 AbstractCegarLoop]: Abstraction has 22785 states and 34985 transitions. [2020-10-29 13:26:40,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:26:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 22785 states and 34985 transitions. [2020-10-29 13:26:40,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 13:26:40,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:40,955 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:26:40,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:26:40,956 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:40,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:40,957 INFO L82 PathProgramCache]: Analyzing trace with hash -126110514, now seen corresponding path program 1 times [2020-10-29 13:26:40,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:40,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405372303] [2020-10-29 13:26:40,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:40,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:41,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:41,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:41,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:41,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:41,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:41,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:41,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:42,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:42,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:42,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:42,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:44,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:46,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:46,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 13:26:46,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:26:46,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 13:26:46,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:46,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:46,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:26:46,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:26:46,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 13:26:46,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:46,318 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:26:46,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:46,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:46,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:46,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:46,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:46,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:26:46,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:46,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:46,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:26:46,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:46,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:26:46,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:26:46,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405372303] [2020-10-29 13:26:46,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:46,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:26:46,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082110684] [2020-10-29 13:26:46,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:26:46,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:46,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:26:46,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:26:46,359 INFO L87 Difference]: Start difference. First operand 22785 states and 34985 transitions. Second operand 5 states. [2020-10-29 13:26:46,692 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:26:47,559 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:26:54,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:54,128 INFO L93 Difference]: Finished difference Result 60679 states and 93021 transitions. [2020-10-29 13:26:54,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:26:54,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-10-29 13:26:54,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:54,195 INFO L225 Difference]: With dead ends: 60679 [2020-10-29 13:26:54,195 INFO L226 Difference]: Without dead ends: 39044 [2020-10-29 13:26:54,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:26:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39044 states. [2020-10-29 13:27:01,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39044 to 38721. [2020-10-29 13:27:01,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38721 states. [2020-10-29 13:27:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38721 states to 38721 states and 58681 transitions. [2020-10-29 13:27:01,159 INFO L78 Accepts]: Start accepts. Automaton has 38721 states and 58681 transitions. Word has length 87 [2020-10-29 13:27:01,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:01,159 INFO L481 AbstractCegarLoop]: Abstraction has 38721 states and 58681 transitions. [2020-10-29 13:27:01,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:27:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand 38721 states and 58681 transitions. [2020-10-29 13:27:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 13:27:01,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:01,162 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:27:01,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:27:01,163 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:01,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1992775535, now seen corresponding path program 1 times [2020-10-29 13:27:01,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:01,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765628504] [2020-10-29 13:27:01,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:01,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:01,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:01,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:01,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:01,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:03,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:03,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:03,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:03,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:03,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:05,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:05,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:05,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:06,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:06,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 13:27:06,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:27:06,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:27:06,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:06,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:06,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:27:06,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:27:06,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 13:27:06,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:06,591 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:27:06,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:06,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:06,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:06,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:06,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:06,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:27:06,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:06,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:06,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:06,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:06,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:06,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:27:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:06,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765628504] [2020-10-29 13:27:06,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:06,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:27:06,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438618099] [2020-10-29 13:27:06,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:27:06,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:06,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:27:06,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:27:06,650 INFO L87 Difference]: Start difference. First operand 38721 states and 58681 transitions. Second operand 8 states. [2020-10-29 13:27:07,071 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:27:08,332 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:27:08,621 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:27:08,933 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:27:09,343 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:27:09,701 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:27:10,092 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:27:10,445 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:27:10,786 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:27:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:38,628 INFO L93 Difference]: Finished difference Result 198562 states and 301667 transitions. [2020-10-29 13:27:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 13:27:38,628 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 87 [2020-10-29 13:27:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:39,020 INFO L225 Difference]: With dead ends: 198562 [2020-10-29 13:27:39,020 INFO L226 Difference]: Without dead ends: 160991 [2020-10-29 13:27:39,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-29 13:27:39,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160991 states. [2020-10-29 13:27:47,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160991 to 38721. [2020-10-29 13:27:47,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38721 states. [2020-10-29 13:27:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38721 states to 38721 states and 58553 transitions. [2020-10-29 13:27:47,743 INFO L78 Accepts]: Start accepts. Automaton has 38721 states and 58553 transitions. Word has length 87 [2020-10-29 13:27:47,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:47,744 INFO L481 AbstractCegarLoop]: Abstraction has 38721 states and 58553 transitions. [2020-10-29 13:27:47,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:27:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 38721 states and 58553 transitions. [2020-10-29 13:27:47,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 13:27:47,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:47,747 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:27:47,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:27:47,748 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:47,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:47,748 INFO L82 PathProgramCache]: Analyzing trace with hash 621082907, now seen corresponding path program 1 times [2020-10-29 13:27:47,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:47,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677661333] [2020-10-29 13:27:47,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:47,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:47,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:47,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:47,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:48,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:48,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:51,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:51,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:52,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:52,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:52,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 13:27:52,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:27:52,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:27:52,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:52,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:52,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:27:52,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:27:52,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 13:27:52,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:53,076 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:27:53,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:53,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:53,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:53,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:53,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:53,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:27:53,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:53,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:53,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:53,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:53,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:53,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:53,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677661333] [2020-10-29 13:27:53,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:53,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:27:53,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574999135] [2020-10-29 13:27:53,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:27:53,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:53,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:27:53,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:27:53,110 INFO L87 Difference]: Start difference. First operand 38721 states and 58553 transitions. Second operand 6 states. [2020-10-29 13:27:53,422 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:27:54,336 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:27:54,604 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:28:03,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:03,955 INFO L93 Difference]: Finished difference Result 78319 states and 118372 transitions. [2020-10-29 13:28:03,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:28:03,955 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-29 13:28:03,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:04,011 INFO L225 Difference]: With dead ends: 78319 [2020-10-29 13:28:04,011 INFO L226 Difference]: Without dead ends: 48756 [2020-10-29 13:28:04,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:28:04,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48756 states. [2020-10-29 13:28:12,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48756 to 44038. [2020-10-29 13:28:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44038 states. [2020-10-29 13:28:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44038 states to 44038 states and 66666 transitions. [2020-10-29 13:28:12,790 INFO L78 Accepts]: Start accepts. Automaton has 44038 states and 66666 transitions. Word has length 87 [2020-10-29 13:28:12,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:12,791 INFO L481 AbstractCegarLoop]: Abstraction has 44038 states and 66666 transitions. [2020-10-29 13:28:12,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:28:12,791 INFO L276 IsEmpty]: Start isEmpty. Operand 44038 states and 66666 transitions. [2020-10-29 13:28:12,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-29 13:28:12,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:12,794 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:12,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:28:12,795 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:12,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:12,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1587004706, now seen corresponding path program 1 times [2020-10-29 13:28:12,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:12,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879542070] [2020-10-29 13:28:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:12,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:12,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:12,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:12,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:13,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:13,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:13,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:13,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:14,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking...