/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=DEEPEST --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.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:55:42,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:55:42,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:55:42,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:55:42,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:55:42,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:55:42,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:55:42,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:55:42,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:55:42,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:55:42,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:55:42,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:55:42,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:55:42,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:55:42,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:55:42,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:55:42,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:55:42,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:55:42,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:55:42,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:55:42,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:55:42,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:55:42,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:55:42,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:55:42,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:55:42,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:55:42,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:55:42,560 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:55:42,561 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:55:42,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:55:42,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:55:42,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:55:42,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:55:42,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:55:42,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:55:42,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:55:42,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:55:42,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:55:42,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:55:42,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:55:42,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:55:42,581 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 [2020-10-27 23:55:42,632 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:55:42,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:55:42,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:55:42,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:55:42,636 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:55:42,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:55:42,637 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:55:42,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:55:42,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:55:42,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:55:42,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:55:42,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:55:42,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:55:42,639 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:55:42,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:55:42,639 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:55:42,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:55:42,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:55:42,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:55:42,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:55:42,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:55:42,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:55:42,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:55:42,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:55:42,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:55:42,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:55:42,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:55:42,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:55:42,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:55:42,642 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:55:43,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:55:43,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:55:43,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:55:43,066 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:55:43,067 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:55:43,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-27 23:55:43,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e2cc7fc7/a1ebd0809ae0463d9ab1efea45aeb840/FLAG67fb9053c [2020-10-27 23:55:43,804 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:55:43,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-27 23:55:43,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e2cc7fc7/a1ebd0809ae0463d9ab1efea45aeb840/FLAG67fb9053c [2020-10-27 23:55:44,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e2cc7fc7/a1ebd0809ae0463d9ab1efea45aeb840 [2020-10-27 23:55:44,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:55:44,152 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:55:44,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:55:44,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:55:44,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:55:44,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:55:44" (1/1) ... [2020-10-27 23:55:44,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c6dbd92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:55:44, skipping insertion in model container [2020-10-27 23:55:44,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:55:44" (1/1) ... [2020-10-27 23:55:44,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:55:44,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:55:44,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:55:44,562 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:55:44,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:55:44,768 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:55:44,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:55:44 WrapperNode [2020-10-27 23:55:44,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:55:44,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:55:44,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:55:44,771 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:55:44,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:55:44" (1/1) ... [2020-10-27 23:55:44,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:55:44" (1/1) ... [2020-10-27 23:55:44,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:55:44" (1/1) ... [2020-10-27 23:55:44,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:55:44" (1/1) ... [2020-10-27 23:55:44,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:55:44" (1/1) ... [2020-10-27 23:55:44,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:55:44" (1/1) ... [2020-10-27 23:55:44,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:55:44" (1/1) ... [2020-10-27 23:55:44,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:55:44,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:55:44,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:55:44,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:55:44,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:55:44" (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 [2020-10-27 23:55:44,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:55:44,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:55:44,941 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:55:44,941 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:55:44,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:55:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:55:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:55:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:55:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:55:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:55:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:55:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:55:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:55:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:55:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:55:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:55:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:55:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:55:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:55:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 23:55:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 23:55:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:55:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:55:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:55:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:55:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:55:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:55:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:55:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:55:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:55:45,961 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:55:45,961 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:55:45,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:55:45 BoogieIcfgContainer [2020-10-27 23:55:45,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:55:45,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:55:45,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:55:45,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:55:45,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:55:44" (1/3) ... [2020-10-27 23:55:45,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587b5cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:55:45, skipping insertion in model container [2020-10-27 23:55:45,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:55:44" (2/3) ... [2020-10-27 23:55:45,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587b5cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:55:45, skipping insertion in model container [2020-10-27 23:55:45,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:55:45" (3/3) ... [2020-10-27 23:55:45,972 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-27 23:55:45,984 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:55:45,990 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:55:46,003 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:55:46,032 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:55:46,032 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:55:46,032 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:55:46,032 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:55:46,032 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:55:46,033 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:55:46,033 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:55:46,033 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:55:46,053 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states. [2020-10-27 23:55:46,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 23:55:46,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:55:46,064 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] [2020-10-27 23:55:46,064 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:55:46,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:55:46,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1924019343, now seen corresponding path program 1 times [2020-10-27 23:55:46,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:55:46,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683684689] [2020-10-27 23:55:46,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:55:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:55:46,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:46,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:46,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:47,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:47,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:47,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:50,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:51,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:55:51,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 23:55:51,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:55:51,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 23:55:51,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:55:51,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:55:51,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 23:55:51,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:55:51,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:55:52,411 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:55:52,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:55:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:55:52,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:52,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:55:52,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:55:52,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:55:52,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 23:55:52,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:55:52,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:55:52,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:55:52,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:55:52,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:55:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:55:52,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683684689] [2020-10-27 23:55:52,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:55:52,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:55:52,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116617918] [2020-10-27 23:55:52,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:55:52,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:55:52,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:55:52,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:55:52,556 INFO L87 Difference]: Start difference. First operand 125 states. Second operand 4 states. [2020-10-27 23:55:53,279 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:55:54,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:55:54,096 INFO L93 Difference]: Finished difference Result 267 states and 431 transitions. [2020-10-27 23:55:54,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:55:54,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-27 23:55:54,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:55:54,112 INFO L225 Difference]: With dead ends: 267 [2020-10-27 23:55:54,112 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 23:55:54,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:55:54,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 23:55:54,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2020-10-27 23:55:54,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-27 23:55:54,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 255 transitions. [2020-10-27 23:55:54,211 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 255 transitions. Word has length 77 [2020-10-27 23:55:54,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:55:54,212 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 255 transitions. [2020-10-27 23:55:54,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:55:54,213 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 255 transitions. [2020-10-27 23:55:54,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 23:55:54,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:55:54,221 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] [2020-10-27 23:55:54,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:55:54,222 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:55:54,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:55:54,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1166381261, now seen corresponding path program 1 times [2020-10-27 23:55:54,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:55:54,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959254603] [2020-10-27 23:55:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:55:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:55:54,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:54,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:54,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:54,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:54,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:56,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:59,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:55:59,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 23:55:59,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:55:59,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:55:59,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:55:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:55:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 23:55:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:55:59,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:55:59,692 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:55:59,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:55:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:55:59,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:59,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:55:59,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:55:59,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:55:59,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:55:59,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:55:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:55:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:55:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:55:59,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:55:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:55:59,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959254603] [2020-10-27 23:55:59,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:55:59,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:55:59,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707151932] [2020-10-27 23:55:59,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:55:59,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:55:59,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:55:59,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:55:59,743 INFO L87 Difference]: Start difference. First operand 178 states and 255 transitions. Second operand 4 states. [2020-10-27 23:56:00,179 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:56:00,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:56:00,882 INFO L93 Difference]: Finished difference Result 424 states and 645 transitions. [2020-10-27 23:56:00,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:56:00,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-27 23:56:00,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:56:00,890 INFO L225 Difference]: With dead ends: 424 [2020-10-27 23:56:00,891 INFO L226 Difference]: Without dead ends: 293 [2020-10-27 23:56:00,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:56:00,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-27 23:56:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 290. [2020-10-27 23:56:00,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-27 23:56:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 433 transitions. [2020-10-27 23:56:00,926 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 433 transitions. Word has length 78 [2020-10-27 23:56:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:56:00,926 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 433 transitions. [2020-10-27 23:56:00,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:56:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 433 transitions. [2020-10-27 23:56:00,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 23:56:00,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:56:00,929 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] [2020-10-27 23:56:00,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:56:00,929 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:56:00,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:56:00,930 INFO L82 PathProgramCache]: Analyzing trace with hash 147552819, now seen corresponding path program 1 times [2020-10-27 23:56:00,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:56:00,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390952059] [2020-10-27 23:56:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:56:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:00,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:01,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:01,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:01,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:01,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:03,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:05,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:05,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 23:56:05,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:56:05,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 23:56:05,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:05,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:56:05,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:56:05,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:56:05,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:06,342 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:56:06,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:56:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:06,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:06,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:06,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:56:06,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:56:06,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 23:56:06,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:06,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:56:06,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:56:06,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:56:06,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:56:06,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390952059] [2020-10-27 23:56:06,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:56:06,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:56:06,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85581041] [2020-10-27 23:56:06,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:56:06,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:56:06,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:56:06,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:56:06,400 INFO L87 Difference]: Start difference. First operand 290 states and 433 transitions. Second operand 4 states. [2020-10-27 23:56:06,762 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:56:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:56:07,450 INFO L93 Difference]: Finished difference Result 744 states and 1153 transitions. [2020-10-27 23:56:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:56:07,451 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-27 23:56:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:56:07,456 INFO L225 Difference]: With dead ends: 744 [2020-10-27 23:56:07,456 INFO L226 Difference]: Without dead ends: 501 [2020-10-27 23:56:07,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:56:07,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-10-27 23:56:07,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 498. [2020-10-27 23:56:07,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-10-27 23:56:07,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 761 transitions. [2020-10-27 23:56:07,539 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 761 transitions. Word has length 79 [2020-10-27 23:56:07,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:56:07,542 INFO L481 AbstractCegarLoop]: Abstraction has 498 states and 761 transitions. [2020-10-27 23:56:07,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:56:07,542 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 761 transitions. [2020-10-27 23:56:07,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 23:56:07,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:56:07,551 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] [2020-10-27 23:56:07,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:56:07,554 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:56:07,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:56:07,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1632028069, now seen corresponding path program 1 times [2020-10-27 23:56:07,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:56:07,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364122638] [2020-10-27 23:56:07,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:56:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:07,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:07,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:07,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:07,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:09,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:12,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:12,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 23:56:12,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:56:12,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:56:12,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:12,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:56:12,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:56:12,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:56:12,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 18 [2020-10-27 23:56:13,012 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:56:13,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:56:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:13,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:13,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:13,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:56:13,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:56:13,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:56:13,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:13,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:56:13,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:56:13,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:56:13,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:56:13,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364122638] [2020-10-27 23:56:13,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:56:13,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:56:13,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769203945] [2020-10-27 23:56:13,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:56:13,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:56:13,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:56:13,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:56:13,106 INFO L87 Difference]: Start difference. First operand 498 states and 761 transitions. Second operand 4 states. [2020-10-27 23:56:13,491 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:56:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:56:14,118 INFO L93 Difference]: Finished difference Result 1336 states and 2085 transitions. [2020-10-27 23:56:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:56:14,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-27 23:56:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:56:14,125 INFO L225 Difference]: With dead ends: 1336 [2020-10-27 23:56:14,125 INFO L226 Difference]: Without dead ends: 885 [2020-10-27 23:56:14,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:56:14,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2020-10-27 23:56:14,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 882. [2020-10-27 23:56:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 882 states. [2020-10-27 23:56:14,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1361 transitions. [2020-10-27 23:56:14,177 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1361 transitions. Word has length 80 [2020-10-27 23:56:14,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:56:14,177 INFO L481 AbstractCegarLoop]: Abstraction has 882 states and 1361 transitions. [2020-10-27 23:56:14,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:56:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1361 transitions. [2020-10-27 23:56:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 23:56:14,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:56:14,178 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] [2020-10-27 23:56:14,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:56:14,179 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:56:14,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:56:14,179 INFO L82 PathProgramCache]: Analyzing trace with hash -729803187, now seen corresponding path program 1 times [2020-10-27 23:56:14,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:56:14,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238661487] [2020-10-27 23:56:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:56:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:14,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:14,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:14,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:14,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:14,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:16,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:19,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:19,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 23:56:19,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:56:19,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:56:19,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:19,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:56:19,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:56:19,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 23:56:19,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:19,572 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:56:19,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:56:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:19,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:19,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:19,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:56:19,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:56:19,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:56:19,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:19,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:56:19,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:56:19,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:56:19,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:56:19,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238661487] [2020-10-27 23:56:19,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:56:19,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:56:19,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110091236] [2020-10-27 23:56:19,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:56:19,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:56:19,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:56:19,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:56:19,631 INFO L87 Difference]: Start difference. First operand 882 states and 1361 transitions. Second operand 7 states. [2020-10-27 23:56:20,004 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:56:20,795 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:56:21,125 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:56:21,852 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:56:22,166 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:56:22,767 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:56:23,100 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:56:23,735 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:56:23,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:56:23,834 INFO L93 Difference]: Finished difference Result 7538 states and 11825 transitions. [2020-10-27 23:56:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:56:23,835 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-10-27 23:56:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:56:23,876 INFO L225 Difference]: With dead ends: 7538 [2020-10-27 23:56:23,876 INFO L226 Difference]: Without dead ends: 6703 [2020-10-27 23:56:23,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:56:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6703 states. [2020-10-27 23:56:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6703 to 2530. [2020-10-27 23:56:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2530 states. [2020-10-27 23:56:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3945 transitions. [2020-10-27 23:56:24,090 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3945 transitions. Word has length 81 [2020-10-27 23:56:24,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:56:24,091 INFO L481 AbstractCegarLoop]: Abstraction has 2530 states and 3945 transitions. [2020-10-27 23:56:24,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:56:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3945 transitions. [2020-10-27 23:56:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 23:56:24,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:56:24,092 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] [2020-10-27 23:56:24,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:56:24,092 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:56:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:56:24,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1998174862, now seen corresponding path program 1 times [2020-10-27 23:56:24,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:56:24,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202392374] [2020-10-27 23:56:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:56:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:24,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:24,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:24,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:24,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:27,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:27,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 23:56:27,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:56:27,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3214 [2020-10-27 23:56:27,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:27,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:56:27,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:56:27,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:56:27,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:27,714 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:56:27,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:56:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:27,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:27,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:27,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:56:27,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:56:27,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 23:56:27,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:27,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:56:27,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:56:27,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:56:27,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:56:27,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202392374] [2020-10-27 23:56:27,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:56:27,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:56:27,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676241757] [2020-10-27 23:56:27,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:56:27,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:56:27,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:56:27,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:56:27,789 INFO L87 Difference]: Start difference. First operand 2530 states and 3945 transitions. Second operand 4 states. [2020-10-27 23:56:28,253 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:56:29,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:56:29,037 INFO L93 Difference]: Finished difference Result 7112 states and 11117 transitions. [2020-10-27 23:56:29,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:56:29,038 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-27 23:56:29,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:56:29,067 INFO L225 Difference]: With dead ends: 7112 [2020-10-27 23:56:29,067 INFO L226 Difference]: Without dead ends: 4629 [2020-10-27 23:56:29,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:56:29,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4629 states. [2020-10-27 23:56:29,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4629 to 4626. [2020-10-27 23:56:29,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4626 states. [2020-10-27 23:56:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 7169 transitions. [2020-10-27 23:56:29,363 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 7169 transitions. Word has length 81 [2020-10-27 23:56:29,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:56:29,364 INFO L481 AbstractCegarLoop]: Abstraction has 4626 states and 7169 transitions. [2020-10-27 23:56:29,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:56:29,364 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 7169 transitions. [2020-10-27 23:56:29,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 23:56:29,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:56:29,365 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] [2020-10-27 23:56:29,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:56:29,365 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:56:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:56:29,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1541958448, now seen corresponding path program 1 times [2020-10-27 23:56:29,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:56:29,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939797109] [2020-10-27 23:56:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:56:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:29,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:29,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:29,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:31,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:31,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 23:56:31,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:56:31,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2277 [2020-10-27 23:56:31,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:31,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:56:31,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 23:56:31,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:56:31,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:32,015 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:56:32,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:56:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:32,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:32,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:32,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:56:32,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:56:32,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:56:32,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:32,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:56:32,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:56:32,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:56:32,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:56:32,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939797109] [2020-10-27 23:56:32,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:56:32,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:56:32,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007943788] [2020-10-27 23:56:32,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:56:32,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:56:32,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:56:32,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:56:32,064 INFO L87 Difference]: Start difference. First operand 4626 states and 7169 transitions. Second operand 4 states. [2020-10-27 23:56:32,370 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:56:33,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:56:33,347 INFO L93 Difference]: Finished difference Result 13016 states and 20165 transitions. [2020-10-27 23:56:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:56:33,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-27 23:56:33,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:56:33,392 INFO L225 Difference]: With dead ends: 13016 [2020-10-27 23:56:33,393 INFO L226 Difference]: Without dead ends: 8437 [2020-10-27 23:56:33,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:56:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8437 states. [2020-10-27 23:56:33,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8437 to 8434. [2020-10-27 23:56:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8434 states. [2020-10-27 23:56:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8434 states to 8434 states and 12945 transitions. [2020-10-27 23:56:34,004 INFO L78 Accepts]: Start accepts. Automaton has 8434 states and 12945 transitions. Word has length 82 [2020-10-27 23:56:34,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:56:34,004 INFO L481 AbstractCegarLoop]: Abstraction has 8434 states and 12945 transitions. [2020-10-27 23:56:34,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:56:34,004 INFO L276 IsEmpty]: Start isEmpty. Operand 8434 states and 12945 transitions. [2020-10-27 23:56:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:56:34,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:56:34,005 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] [2020-10-27 23:56:34,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:56:34,005 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:56:34,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:56:34,006 INFO L82 PathProgramCache]: Analyzing trace with hash 587287780, now seen corresponding path program 1 times [2020-10-27 23:56:34,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:56:34,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337534758] [2020-10-27 23:56:34,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:56:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:34,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:34,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:34,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:34,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:37,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:37,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:56:37,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:56:37,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3462 [2020-10-27 23:56:37,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:37,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:56:37,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:56:37,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 23:56:37,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:37,934 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:56:37,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:56:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:37,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:37,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:37,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:56:37,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:56:37,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:56:37,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:37,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:56:37,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:56:37,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:56:37,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:56:37,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337534758] [2020-10-27 23:56:37,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:56:37,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:56:37,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690121295] [2020-10-27 23:56:38,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:56:38,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:56:38,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:56:38,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:56:38,003 INFO L87 Difference]: Start difference. First operand 8434 states and 12945 transitions. Second operand 7 states. [2020-10-27 23:56:38,440 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:56:39,145 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:56:39,510 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:56:40,451 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:56:40,770 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:56:42,498 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:56:42,813 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:56:43,906 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:56:44,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:56:44,064 INFO L93 Difference]: Finished difference Result 58649 states and 90037 transitions. [2020-10-27 23:56:44,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:56:44,064 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-27 23:56:44,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:56:44,260 INFO L225 Difference]: With dead ends: 58649 [2020-10-27 23:56:44,260 INFO L226 Difference]: Without dead ends: 53046 [2020-10-27 23:56:44,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:56:44,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53046 states. [2020-10-27 23:56:45,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53046 to 16737. [2020-10-27 23:56:45,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16737 states. [2020-10-27 23:56:45,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16737 states to 16737 states and 25573 transitions. [2020-10-27 23:56:45,926 INFO L78 Accepts]: Start accepts. Automaton has 16737 states and 25573 transitions. Word has length 83 [2020-10-27 23:56:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:56:45,927 INFO L481 AbstractCegarLoop]: Abstraction has 16737 states and 25573 transitions. [2020-10-27 23:56:45,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:56:45,927 INFO L276 IsEmpty]: Start isEmpty. Operand 16737 states and 25573 transitions. [2020-10-27 23:56:45,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:56:45,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:56:45,928 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] [2020-10-27 23:56:45,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:56:45,928 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:56:45,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:56:45,929 INFO L82 PathProgramCache]: Analyzing trace with hash -580885852, now seen corresponding path program 1 times [2020-10-27 23:56:45,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:56:45,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364141892] [2020-10-27 23:56:45,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:56:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:45,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:46,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:46,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:46,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:48,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:48,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:56:48,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:56:48,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2878 [2020-10-27 23:56:48,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:48,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:56:48,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:56:48,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 23:56:48,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:49,157 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:56:49,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:56:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:49,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:49,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:49,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:56:49,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:56:49,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:56:49,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:49,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:56:49,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:56:49,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:56:49,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:56:49,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364141892] [2020-10-27 23:56:49,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:56:49,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:56:49,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262013523] [2020-10-27 23:56:49,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:56:49,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:56:49,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:56:49,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:56:49,198 INFO L87 Difference]: Start difference. First operand 16737 states and 25573 transitions. Second operand 7 states. [2020-10-27 23:56:49,528 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:56:50,267 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:56:50,604 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:56:51,478 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:56:51,804 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:56:53,452 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:56:53,841 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:56:54,838 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:56:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:56:55,139 INFO L93 Difference]: Finished difference Result 67780 states and 103426 transitions. [2020-10-27 23:56:55,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:56:55,140 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-27 23:56:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:56:55,277 INFO L225 Difference]: With dead ends: 67780 [2020-10-27 23:56:55,277 INFO L226 Difference]: Without dead ends: 56641 [2020-10-27 23:56:55,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:56:55,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56641 states. [2020-10-27 23:56:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56641 to 22273. [2020-10-27 23:56:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22273 states. [2020-10-27 23:56:57,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22273 states to 22273 states and 34053 transitions. [2020-10-27 23:56:57,899 INFO L78 Accepts]: Start accepts. Automaton has 22273 states and 34053 transitions. Word has length 83 [2020-10-27 23:56:57,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:56:57,899 INFO L481 AbstractCegarLoop]: Abstraction has 22273 states and 34053 transitions. [2020-10-27 23:56:57,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:56:57,899 INFO L276 IsEmpty]: Start isEmpty. Operand 22273 states and 34053 transitions. [2020-10-27 23:56:57,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:56:57,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:56:57,900 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] [2020-10-27 23:56:57,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:56:57,901 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:56:57,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:56:57,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1849257527, now seen corresponding path program 1 times [2020-10-27 23:56:57,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:56:57,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935516084] [2020-10-27 23:56:57,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:56:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:57,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:58,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:58,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:58,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:56:58,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:56:58,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 736 [2020-10-27 23:56:58,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:58,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:56:58,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:56:58,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 23:56:58,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:59,057 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:56:59,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:56:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:59,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:59,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:59,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:56:59,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:56:59,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:56:59,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:59,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:56:59,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:56:59,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:56:59,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:56:59,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935516084] [2020-10-27 23:56:59,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:56:59,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:56:59,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788590194] [2020-10-27 23:56:59,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:56:59,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:56:59,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:56:59,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:56:59,106 INFO L87 Difference]: Start difference. First operand 22273 states and 34053 transitions. Second operand 9 states. [2020-10-27 23:56:59,593 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 23:57:01,972 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:57:02,324 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:57:02,706 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:57:03,066 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:57:03,430 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:57:04,387 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:57:04,734 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:57:05,091 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:57:05,467 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:57:05,829 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:57:19,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:57:19,827 INFO L93 Difference]: Finished difference Result 288805 states and 441885 transitions. [2020-10-27 23:57:19,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 23:57:19,828 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-27 23:57:19,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:57:20,625 INFO L225 Difference]: With dead ends: 288805 [2020-10-27 23:57:20,625 INFO L226 Difference]: Without dead ends: 266594 [2020-10-27 23:57:20,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-27 23:57:20,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266594 states. [2020-10-27 23:57:26,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266594 to 44481. [2020-10-27 23:57:26,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44481 states. [2020-10-27 23:57:26,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44481 states to 44481 states and 67013 transitions. [2020-10-27 23:57:26,385 INFO L78 Accepts]: Start accepts. Automaton has 44481 states and 67013 transitions. Word has length 83 [2020-10-27 23:57:26,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:57:26,385 INFO L481 AbstractCegarLoop]: Abstraction has 44481 states and 67013 transitions. [2020-10-27 23:57:26,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:57:26,385 INFO L276 IsEmpty]: Start isEmpty. Operand 44481 states and 67013 transitions. [2020-10-27 23:57:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 23:57:26,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:57:26,386 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] [2020-10-27 23:57:26,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:57:26,387 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:57:26,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:57:26,387 INFO L82 PathProgramCache]: Analyzing trace with hash -945849426, now seen corresponding path program 1 times [2020-10-27 23:57:26,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:57:26,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296054351] [2020-10-27 23:57:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:57:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:26,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:26,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:26,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:26,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:27,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:27,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 23:57:27,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:57:27,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-10-27 23:57:27,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:27,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:57:27,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 23:57:27,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:57:27,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:27,877 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:57:27,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:57:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:27,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:27,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:27,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:57:27,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:57:27,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 23:57:27,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:27,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:57:27,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:57:27,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:57:27,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:57:27,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296054351] [2020-10-27 23:57:27,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:57:27,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:57:27,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479952170] [2020-10-27 23:57:27,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:57:27,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:57:27,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:57:27,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:57:27,971 INFO L87 Difference]: Start difference. First operand 44481 states and 67013 transitions. Second operand 5 states. [2020-10-27 23:57:35,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:57:35,960 INFO L93 Difference]: Finished difference Result 90948 states and 136007 transitions. [2020-10-27 23:57:35,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:57:35,960 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-10-27 23:57:35,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:57:36,071 INFO L225 Difference]: With dead ends: 90948 [2020-10-27 23:57:36,072 INFO L226 Difference]: Without dead ends: 90945 [2020-10-27 23:57:36,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:57:36,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90945 states. [2020-10-27 23:57:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90945 to 46529. [2020-10-27 23:57:40,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46529 states. [2020-10-27 23:57:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46529 states to 46529 states and 69061 transitions. [2020-10-27 23:57:41,023 INFO L78 Accepts]: Start accepts. Automaton has 46529 states and 69061 transitions. Word has length 85 [2020-10-27 23:57:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:57:41,023 INFO L481 AbstractCegarLoop]: Abstraction has 46529 states and 69061 transitions. [2020-10-27 23:57:41,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:57:41,023 INFO L276 IsEmpty]: Start isEmpty. Operand 46529 states and 69061 transitions. [2020-10-27 23:57:41,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 23:57:41,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:57:41,024 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] [2020-10-27 23:57:41,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:57:41,025 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:57:41,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:57:41,025 INFO L82 PathProgramCache]: Analyzing trace with hash -324319793, now seen corresponding path program 1 times [2020-10-27 23:57:41,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:57:41,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836450780] [2020-10-27 23:57:41,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:57:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:41,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:41,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:42,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:42,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 23:57:42,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:57:42,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1118 [2020-10-27 23:57:42,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:42,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:57:42,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:57:42,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 23:57:42,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:42,634 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:57:42,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:57:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:42,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:42,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:42,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:57:42,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:57:42,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:57:42,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:42,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:57:42,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:57:42,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:57:42,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:57:42,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836450780] [2020-10-27 23:57:42,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:57:42,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:57:42,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366357189] [2020-10-27 23:57:42,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:57:42,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:57:42,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:57:42,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:57:42,691 INFO L87 Difference]: Start difference. First operand 46529 states and 69061 transitions. Second operand 9 states. [2020-10-27 23:57:43,214 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:57:46,394 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:57:46,786 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:57:47,226 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 23:57:47,635 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 23:57:48,004 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:57:49,975 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:57:50,370 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:57:50,750 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:57:51,195 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 23:57:51,616 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 23:58:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:58:14,274 INFO L93 Difference]: Finished difference Result 325349 states and 483037 transitions. [2020-10-27 23:58:14,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 23:58:14,275 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 85 [2020-10-27 23:58:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:58:15,035 INFO L225 Difference]: With dead ends: 325349 [2020-10-27 23:58:15,035 INFO L226 Difference]: Without dead ends: 278882 [2020-10-27 23:58:15,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-27 23:58:15,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278882 states. [2020-10-27 23:58:22,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278882 to 46529. [2020-10-27 23:58:22,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46529 states. [2020-10-27 23:58:22,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46529 states to 46529 states and 68549 transitions. [2020-10-27 23:58:22,376 INFO L78 Accepts]: Start accepts. Automaton has 46529 states and 68549 transitions. Word has length 85 [2020-10-27 23:58:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:58:22,377 INFO L481 AbstractCegarLoop]: Abstraction has 46529 states and 68549 transitions. [2020-10-27 23:58:22,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:58:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 46529 states and 68549 transitions. [2020-10-27 23:58:22,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 23:58:22,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:58:22,378 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] [2020-10-27 23:58:22,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:58:22,378 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:58:22,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:58:22,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1041442579, now seen corresponding path program 1 times [2020-10-27 23:58:22,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:58:22,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159448571] [2020-10-27 23:58:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:58:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:22,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:22,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:22,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:22,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:22,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 23:58:22,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:58:22,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 596 [2020-10-27 23:58:22,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:22,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:58:22,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 23:58:22,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 23:58:22,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:23,320 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:58:23,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:58:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:23,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:23,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:23,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:58:23,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:58:23,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:58:23,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:23,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:58:23,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:58:23,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:58:23,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:58:23,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159448571] [2020-10-27 23:58:23,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:58:23,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:58:23,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052560028] [2020-10-27 23:58:23,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:58:23,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:58:23,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:58:23,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:58:23,353 INFO L87 Difference]: Start difference. First operand 46529 states and 68549 transitions. Second operand 4 states. [2020-10-27 23:58:23,681 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:58:32,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:58:32,129 INFO L93 Difference]: Finished difference Result 114439 states and 168713 transitions. [2020-10-27 23:58:32,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:58:32,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-10-27 23:58:32,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:58:32,213 INFO L225 Difference]: With dead ends: 114439 [2020-10-27 23:58:32,213 INFO L226 Difference]: Without dead ends: 67972 [2020-10-27 23:58:32,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:58:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67972 states. [2020-10-27 23:58:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67972 to 67969. [2020-10-27 23:58:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67969 states. [2020-10-27 23:58:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67969 states to 67969 states and 99461 transitions. [2020-10-27 23:58:40,631 INFO L78 Accepts]: Start accepts. Automaton has 67969 states and 99461 transitions. Word has length 86 [2020-10-27 23:58:40,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:58:40,632 INFO L481 AbstractCegarLoop]: Abstraction has 67969 states and 99461 transitions. [2020-10-27 23:58:40,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:58:40,632 INFO L276 IsEmpty]: Start isEmpty. Operand 67969 states and 99461 transitions. [2020-10-27 23:58:40,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 23:58:40,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:58:40,664 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:58:40,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:58:40,664 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:58:40,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:58:40,665 INFO L82 PathProgramCache]: Analyzing trace with hash 995352366, now seen corresponding path program 1 times [2020-10-27 23:58:40,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:58:40,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788993762] [2020-10-27 23:58:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:58:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:40,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:40,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:40,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:41,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:41,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:42,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:42,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:42,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:42,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:42,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:43,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:43,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:43,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:45,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:45,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:45,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 23:58:45,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:58:45,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 23:58:45,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:45,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:58:45,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 23:58:45,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 23:58:45,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:46,211 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:58:46,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:58:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:46,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:46,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:46,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:58:46,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:58:46,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:58:46,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:46,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:58:46,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:58:46,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:58:46,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 23:58:46,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788993762] [2020-10-27 23:58:46,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:58:46,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 23:58:46,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335552438] [2020-10-27 23:58:46,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:58:46,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:58:46,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:58:46,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:58:46,274 INFO L87 Difference]: Start difference. First operand 67969 states and 99461 transitions. Second operand 9 states. [2020-10-27 23:58:46,697 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-27 23:58:49,918 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:58:50,301 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:58:50,661 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:58:51,014 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:58:52,213 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:58:52,569 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:58:52,927 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 23:58:53,270 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:58:53,602 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 188