/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:13:16,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:13:16,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:13:16,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:13:16,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:13:16,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:13:16,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:13:16,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:13:16,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:13:16,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:13:16,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:13:16,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:13:16,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:13:16,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:13:16,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:13:16,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:13:16,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:13:16,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:13:16,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:13:16,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:13:16,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:13:16,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:13:16,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:13:16,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:13:16,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:13:16,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:13:16,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:13:16,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:13:16,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:13:16,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:13:16,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:13:16,717 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:13:16,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:13:16,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:13:16,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:13:16,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:13:16,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:13:16,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:13:16,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:13:16,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:13:16,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:13:16,733 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:13:16,788 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:13:16,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:13:16,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:13:16,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:13:16,793 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:13:16,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:13:16,793 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:13:16,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:13:16,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:13:16,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:13:16,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:13:16,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:13:16,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:13:16,795 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:13:16,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:13:16,796 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:13:16,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:13:16,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:13:16,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:13:16,797 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:13:16,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:13:16,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:13:16,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:13:16,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:13:16,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:13:16,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:13:16,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:13:16,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:13:16,798 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:13:16,799 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:13:17,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:13:17,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:13:17,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:13:17,283 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:13:17,283 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:13:17,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-29 13:13:17,369 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/794e919ca/854e6a2a529e4b0cb3dc93e8c98f3fb4/FLAGed360b4d6 [2020-10-29 13:13:18,147 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:13:18,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-29 13:13:18,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/794e919ca/854e6a2a529e4b0cb3dc93e8c98f3fb4/FLAGed360b4d6 [2020-10-29 13:13:18,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/794e919ca/854e6a2a529e4b0cb3dc93e8c98f3fb4 [2020-10-29 13:13:18,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:13:18,402 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:13:18,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:13:18,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:13:18,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:13:18,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:13:18" (1/1) ... [2020-10-29 13:13:18,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dd82222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:18, skipping insertion in model container [2020-10-29 13:13:18,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:13:18" (1/1) ... [2020-10-29 13:13:18,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:13:18,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:13:19,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:13:19,017 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:13:19,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:13:19,188 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:13:19,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:19 WrapperNode [2020-10-29 13:13:19,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:13:19,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:13:19,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:13:19,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:13:19,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:19" (1/1) ... [2020-10-29 13:13:19,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:19" (1/1) ... [2020-10-29 13:13:19,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:19" (1/1) ... [2020-10-29 13:13:19,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:19" (1/1) ... [2020-10-29 13:13:19,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:19" (1/1) ... [2020-10-29 13:13:19,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:19" (1/1) ... [2020-10-29 13:13:19,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:19" (1/1) ... [2020-10-29 13:13:19,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:13:19,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:13:19,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:13:19,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:13:19,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:13:19,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:13:19,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:13:19,455 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:13:19,456 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:13:19,456 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:13:19,457 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:13:19,457 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:13:19,457 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:13:19,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:13:19,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:13:19,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:13:19,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:13:19,459 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:13:19,459 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:13:19,459 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:13:19,460 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:13:19,460 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:13:19,460 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:13:19,460 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:13:19,461 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:13:19,461 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:13:19,461 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:13:19,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:13:19,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:13:19,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:13:19,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:13:19,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:13:19,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:13:21,094 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:13:21,094 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:13:21,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:13:21 BoogieIcfgContainer [2020-10-29 13:13:21,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:13:21,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:13:21,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:13:21,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:13:21,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:13:18" (1/3) ... [2020-10-29 13:13:21,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f1deb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:13:21, skipping insertion in model container [2020-10-29 13:13:21,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:19" (2/3) ... [2020-10-29 13:13:21,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f1deb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:13:21, skipping insertion in model container [2020-10-29 13:13:21,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:13:21" (3/3) ... [2020-10-29 13:13:21,107 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-29 13:13:21,121 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:13:21,128 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:13:21,144 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:13:21,176 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:13:21,177 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:13:21,177 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:13:21,177 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:13:21,177 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:13:21,177 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:13:21,178 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:13:21,178 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:13:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states. [2020-10-29 13:13:21,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 13:13:21,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:21,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:21,219 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:21,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:21,226 INFO L82 PathProgramCache]: Analyzing trace with hash -624284439, now seen corresponding path program 1 times [2020-10-29 13:13:21,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:21,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42488780] [2020-10-29 13:13:21,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:21,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:22,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:22,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:24,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:24,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:25,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:25,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:25,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:26,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:26,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:26,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:26,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 13:13:26,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:13:26,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:13:26,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:26,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:13:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:13:26,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:13:27,140 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:13:27,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:27,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:27,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:27,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:27,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:27,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:13:27,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:27,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:27,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:27,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:27,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:27,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:27,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42488780] [2020-10-29 13:13:27,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:27,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:13:27,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263945850] [2020-10-29 13:13:27,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:13:27,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:27,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:13:27,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:13:27,227 INFO L87 Difference]: Start difference. First operand 275 states. Second operand 9 states. [2020-10-29 13:13:27,622 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:13:29,827 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:13:30,224 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:13:30,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:30,773 INFO L93 Difference]: Finished difference Result 519 states and 871 transitions. [2020-10-29 13:13:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:13:30,774 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2020-10-29 13:13:30,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:30,798 INFO L225 Difference]: With dead ends: 519 [2020-10-29 13:13:30,799 INFO L226 Difference]: Without dead ends: 462 [2020-10-29 13:13:30,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:13:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-10-29 13:13:30,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 254. [2020-10-29 13:13:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-29 13:13:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 318 transitions. [2020-10-29 13:13:30,921 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 318 transitions. Word has length 52 [2020-10-29 13:13:30,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:30,922 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 318 transitions. [2020-10-29 13:13:30,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:13:30,923 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 318 transitions. [2020-10-29 13:13:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 13:13:30,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:30,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:30,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:13:30,938 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:30,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:30,938 INFO L82 PathProgramCache]: Analyzing trace with hash -58264428, now seen corresponding path program 1 times [2020-10-29 13:13:30,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:30,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373488056] [2020-10-29 13:13:30,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:31,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:32,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:32,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:33,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:33,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:36,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:36,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 13:13:36,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:13:36,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 13:13:36,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:36,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:36,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:36,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:13:36,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:13:36,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:36,385 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:13:36,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:36,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:36,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:36,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:36,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:36,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-29 13:13:36,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:36,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:36,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:13:36,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:36,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:13:36,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:36,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373488056] [2020-10-29 13:13:36,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:36,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:13:36,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19469840] [2020-10-29 13:13:36,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:36,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:36,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:36,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:36,475 INFO L87 Difference]: Start difference. First operand 254 states and 318 transitions. Second operand 6 states. [2020-10-29 13:13:36,791 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:13:37,866 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:13:38,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:38,143 INFO L93 Difference]: Finished difference Result 406 states and 525 transitions. [2020-10-29 13:13:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:13:38,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-29 13:13:38,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:38,148 INFO L225 Difference]: With dead ends: 406 [2020-10-29 13:13:38,148 INFO L226 Difference]: Without dead ends: 284 [2020-10-29 13:13:38,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:13:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-29 13:13:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 269. [2020-10-29 13:13:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-29 13:13:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 352 transitions. [2020-10-29 13:13:38,178 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 352 transitions. Word has length 52 [2020-10-29 13:13:38,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:38,180 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 352 transitions. [2020-10-29 13:13:38,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 352 transitions. [2020-10-29 13:13:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 13:13:38,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:38,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:38,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:13:38,183 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:38,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:38,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2118713766, now seen corresponding path program 1 times [2020-10-29 13:13:38,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:38,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694528023] [2020-10-29 13:13:38,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:38,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:38,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:38,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:38,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:38,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:39,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:39,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:39,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:39,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:41,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:42,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:43,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:43,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 13:13:43,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:13:43,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:13:43,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:43,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:43,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:43,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:13:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 13:13:43,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:43,511 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:13:43,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:43,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:43,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:43,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:43,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:43,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:13:43,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:43,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:43,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:43,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:43,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:43,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:43,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694528023] [2020-10-29 13:13:43,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:43,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:13:43,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813443695] [2020-10-29 13:13:43,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:43,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:43,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:43,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:43,572 INFO L87 Difference]: Start difference. First operand 269 states and 352 transitions. Second operand 6 states. [2020-10-29 13:13:43,832 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:13:44,956 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:13:45,317 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:13:45,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:45,803 INFO L93 Difference]: Finished difference Result 689 states and 965 transitions. [2020-10-29 13:13:45,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:13:45,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-29 13:13:45,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:45,808 INFO L225 Difference]: With dead ends: 689 [2020-10-29 13:13:45,808 INFO L226 Difference]: Without dead ends: 599 [2020-10-29 13:13:45,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:13:45,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2020-10-29 13:13:45,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 552. [2020-10-29 13:13:45,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-10-29 13:13:45,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 781 transitions. [2020-10-29 13:13:45,885 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 781 transitions. Word has length 52 [2020-10-29 13:13:45,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:45,885 INFO L481 AbstractCegarLoop]: Abstraction has 552 states and 781 transitions. [2020-10-29 13:13:45,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:45,886 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 781 transitions. [2020-10-29 13:13:45,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 13:13:45,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:45,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:45,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:13:45,888 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:45,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:45,889 INFO L82 PathProgramCache]: Analyzing trace with hash 936770437, now seen corresponding path program 1 times [2020-10-29 13:13:45,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:45,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008012991] [2020-10-29 13:13:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:45,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:45,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:46,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:46,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:46,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:46,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:47,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:47,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:49,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:49,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:49,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:50,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 13:13:50,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:13:50,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-29 13:13:50,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:50,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:50,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:13:50,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:50,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:13:50,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:51,350 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:13:51,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:51,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:51,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:51,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:51,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:51,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:13:51,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:51,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:51,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:51,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:51,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:51,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:51,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008012991] [2020-10-29 13:13:51,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:51,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:13:51,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787928468] [2020-10-29 13:13:51,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:13:51,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:51,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:13:51,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:13:51,411 INFO L87 Difference]: Start difference. First operand 552 states and 781 transitions. Second operand 8 states. [2020-10-29 13:13:51,694 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:13:52,763 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:13:53,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:53,359 INFO L93 Difference]: Finished difference Result 1581 states and 2379 transitions. [2020-10-29 13:13:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:13:53,360 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-10-29 13:13:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:53,369 INFO L225 Difference]: With dead ends: 1581 [2020-10-29 13:13:53,369 INFO L226 Difference]: Without dead ends: 1239 [2020-10-29 13:13:53,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:13:53,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2020-10-29 13:13:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 550. [2020-10-29 13:13:53,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 550 states. [2020-10-29 13:13:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 778 transitions. [2020-10-29 13:13:53,445 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 778 transitions. Word has length 52 [2020-10-29 13:13:53,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:53,446 INFO L481 AbstractCegarLoop]: Abstraction has 550 states and 778 transitions. [2020-10-29 13:13:53,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:13:53,447 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 778 transitions. [2020-10-29 13:13:53,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 13:13:53,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:53,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:53,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:13:53,449 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:53,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:53,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1183796705, now seen corresponding path program 1 times [2020-10-29 13:13:53,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:53,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279187932] [2020-10-29 13:13:53,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:53,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:53,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:53,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:53,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:53,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:53,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:55,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:55,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:55,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:58,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:58,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 13:13:58,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:13:58,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 13:13:58,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:58,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:58,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:58,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:13:58,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:13:58,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:58,802 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:13:58,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:58,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:58,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:58,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:58,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:58,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:13:58,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:58,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:58,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:58,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:58,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:58,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:58,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279187932] [2020-10-29 13:13:58,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:58,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:13:58,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109160717] [2020-10-29 13:13:58,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:58,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:58,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:58,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:58,836 INFO L87 Difference]: Start difference. First operand 550 states and 778 transitions. Second operand 6 states. [2020-10-29 13:13:59,127 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:14:00,183 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:14:00,494 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:14:01,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:01,211 INFO L93 Difference]: Finished difference Result 2324 states and 3489 transitions. [2020-10-29 13:14:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:14:01,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-29 13:14:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:01,223 INFO L225 Difference]: With dead ends: 2324 [2020-10-29 13:14:01,223 INFO L226 Difference]: Without dead ends: 1988 [2020-10-29 13:14:01,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:14:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2020-10-29 13:14:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1638. [2020-10-29 13:14:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1638 states. [2020-10-29 13:14:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2430 transitions. [2020-10-29 13:14:01,372 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2430 transitions. Word has length 52 [2020-10-29 13:14:01,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:01,372 INFO L481 AbstractCegarLoop]: Abstraction has 1638 states and 2430 transitions. [2020-10-29 13:14:01,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:01,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2430 transitions. [2020-10-29 13:14:01,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:14:01,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:01,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:01,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:14:01,375 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:01,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:01,375 INFO L82 PathProgramCache]: Analyzing trace with hash 914400266, now seen corresponding path program 1 times [2020-10-29 13:14:01,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:01,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736969849] [2020-10-29 13:14:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:01,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:01,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:01,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:01,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:01,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:02,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:02,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:02,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:03,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:03,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:03,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:03,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:04,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:04,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:04,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:04,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:05,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:05,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:05,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:05,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:06,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:14:06,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-29 13:14:06,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:14:06,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:06,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:06,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:14:06,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:06,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 13:14:06,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:06,972 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:06,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:06,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:06,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:06,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:06,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:14:06,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:06,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:06,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:07,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736969849] [2020-10-29 13:14:07,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:07,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:14:07,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344670190] [2020-10-29 13:14:07,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:14:07,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:07,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:14:07,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:14:07,022 INFO L87 Difference]: Start difference. First operand 1638 states and 2430 transitions. Second operand 8 states. [2020-10-29 13:14:07,795 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 185 [2020-10-29 13:14:09,552 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 190 [2020-10-29 13:14:10,627 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:14:10,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:10,859 INFO L93 Difference]: Finished difference Result 5025 states and 7735 transitions. [2020-10-29 13:14:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:14:10,860 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-29 13:14:10,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:10,880 INFO L225 Difference]: With dead ends: 5025 [2020-10-29 13:14:10,880 INFO L226 Difference]: Without dead ends: 3704 [2020-10-29 13:14:10,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:14:10,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2020-10-29 13:14:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 1606. [2020-10-29 13:14:11,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-10-29 13:14:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2383 transitions. [2020-10-29 13:14:11,128 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2383 transitions. Word has length 53 [2020-10-29 13:14:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:11,128 INFO L481 AbstractCegarLoop]: Abstraction has 1606 states and 2383 transitions. [2020-10-29 13:14:11,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:14:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2383 transitions. [2020-10-29 13:14:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:14:11,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:11,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:11,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:14:11,131 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:11,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:11,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1886222156, now seen corresponding path program 1 times [2020-10-29 13:14:11,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:11,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49008264] [2020-10-29 13:14:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:11,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:11,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:11,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:11,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:11,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:11,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:12,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:12,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:12,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:12,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:12,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:13,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:13,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:13,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:16,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:16,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:14:16,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:14:16,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:14:16,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:16,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:16,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:14:16,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:16,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:14:16,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:16,482 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:16,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:16,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:16,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:16,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:16,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:16,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:14:16,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:16,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:16,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:16,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:16,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:16,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:16,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49008264] [2020-10-29 13:14:16,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:16,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:14:16,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693765230] [2020-10-29 13:14:16,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:14:16,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:16,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:14:16,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:14:16,522 INFO L87 Difference]: Start difference. First operand 1606 states and 2383 transitions. Second operand 8 states. [2020-10-29 13:14:16,846 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:14:17,988 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:14:18,254 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:14:18,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:18,971 INFO L93 Difference]: Finished difference Result 2624 states and 3930 transitions. [2020-10-29 13:14:18,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:14:18,976 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-29 13:14:18,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:18,986 INFO L225 Difference]: With dead ends: 2624 [2020-10-29 13:14:18,987 INFO L226 Difference]: Without dead ends: 1976 [2020-10-29 13:14:18,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:14:18,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-10-29 13:14:19,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1606. [2020-10-29 13:14:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-10-29 13:14:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2374 transitions. [2020-10-29 13:14:19,195 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2374 transitions. Word has length 53 [2020-10-29 13:14:19,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:19,196 INFO L481 AbstractCegarLoop]: Abstraction has 1606 states and 2374 transitions. [2020-10-29 13:14:19,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:14:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2374 transitions. [2020-10-29 13:14:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:14:19,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:19,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:19,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:14:19,201 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:19,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:19,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1165674538, now seen corresponding path program 1 times [2020-10-29 13:14:19,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:19,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161541094] [2020-10-29 13:14:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:19,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:20,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:20,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:20,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:20,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:24,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:24,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:14:24,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:14:24,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:14:24,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:24,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:24,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:14:24,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:24,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:14:24,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:24,567 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:24,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:24,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:24,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:24,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:24,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:24,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:14:24,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:24,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:24,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:24,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:24,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:24,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:24,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161541094] [2020-10-29 13:14:24,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:24,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:14:24,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940566056] [2020-10-29 13:14:24,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:14:24,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:24,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:14:24,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:14:24,632 INFO L87 Difference]: Start difference. First operand 1606 states and 2374 transitions. Second operand 7 states. [2020-10-29 13:14:24,978 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-29 13:14:25,985 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:14:26,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:26,760 INFO L93 Difference]: Finished difference Result 2831 states and 4279 transitions. [2020-10-29 13:14:26,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:14:26,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-29 13:14:26,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:26,774 INFO L225 Difference]: With dead ends: 2831 [2020-10-29 13:14:26,774 INFO L226 Difference]: Without dead ends: 2475 [2020-10-29 13:14:26,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:14:26,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2020-10-29 13:14:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 1581. [2020-10-29 13:14:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1581 states. [2020-10-29 13:14:26,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2345 transitions. [2020-10-29 13:14:26,993 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2345 transitions. Word has length 53 [2020-10-29 13:14:26,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:26,993 INFO L481 AbstractCegarLoop]: Abstraction has 1581 states and 2345 transitions. [2020-10-29 13:14:26,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:14:26,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2345 transitions. [2020-10-29 13:14:26,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:14:26,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:26,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:26,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:14:26,995 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:26,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:26,995 INFO L82 PathProgramCache]: Analyzing trace with hash 350207193, now seen corresponding path program 1 times [2020-10-29 13:14:26,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:26,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430256804] [2020-10-29 13:14:26,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:27,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:27,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:27,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:27,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:27,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:27,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:27,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:27,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:28,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:28,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:28,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:28,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:28,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:28,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:32,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:32,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:14:32,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:14:32,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:14:32,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:32,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:32,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:14:32,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:32,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:14:32,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:32,349 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:32,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:32,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:32,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:32,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:32,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:32,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:14:32,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:32,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:32,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:32,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:32,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:32,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:32,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430256804] [2020-10-29 13:14:32,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:32,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:14:32,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526049661] [2020-10-29 13:14:32,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:14:32,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:32,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:14:32,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:14:32,378 INFO L87 Difference]: Start difference. First operand 1581 states and 2345 transitions. Second operand 7 states. [2020-10-29 13:14:32,706 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-29 13:14:33,769 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:14:34,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:34,657 INFO L93 Difference]: Finished difference Result 3359 states and 5109 transitions. [2020-10-29 13:14:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:14:34,658 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-29 13:14:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:34,671 INFO L225 Difference]: With dead ends: 3359 [2020-10-29 13:14:34,671 INFO L226 Difference]: Without dead ends: 2693 [2020-10-29 13:14:34,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:14:34,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2020-10-29 13:14:34,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 1559. [2020-10-29 13:14:34,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1559 states. [2020-10-29 13:14:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 2319 transitions. [2020-10-29 13:14:34,906 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 2319 transitions. Word has length 53 [2020-10-29 13:14:34,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:34,906 INFO L481 AbstractCegarLoop]: Abstraction has 1559 states and 2319 transitions. [2020-10-29 13:14:34,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:14:34,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 2319 transitions. [2020-10-29 13:14:34,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:14:34,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:34,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:34,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:14:34,908 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:34,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:34,909 INFO L82 PathProgramCache]: Analyzing trace with hash 708226818, now seen corresponding path program 1 times [2020-10-29 13:14:34,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:34,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697445006] [2020-10-29 13:14:34,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:34,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:36,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:36,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:36,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:37,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:38,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:39,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:39,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:14:39,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:14:39,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:14:39,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:39,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:39,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:14:39,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:39,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 13:14:39,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:40,256 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:40,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:40,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:40,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:40,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:40,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:40,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:14:40,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:40,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:40,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:40,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:40,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:40,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:40,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697445006] [2020-10-29 13:14:40,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:40,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:14:40,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605691924] [2020-10-29 13:14:40,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:14:40,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:40,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:14:40,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:14:40,290 INFO L87 Difference]: Start difference. First operand 1559 states and 2319 transitions. Second operand 7 states. [2020-10-29 13:14:40,627 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-29 13:14:41,730 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:14:42,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:42,443 INFO L93 Difference]: Finished difference Result 2625 states and 3983 transitions. [2020-10-29 13:14:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:14:42,444 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-29 13:14:42,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:42,453 INFO L225 Difference]: With dead ends: 2625 [2020-10-29 13:14:42,453 INFO L226 Difference]: Without dead ends: 1928 [2020-10-29 13:14:42,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:14:42,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2020-10-29 13:14:42,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1192. [2020-10-29 13:14:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2020-10-29 13:14:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1763 transitions. [2020-10-29 13:14:42,614 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1763 transitions. Word has length 54 [2020-10-29 13:14:42,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:42,615 INFO L481 AbstractCegarLoop]: Abstraction has 1192 states and 1763 transitions. [2020-10-29 13:14:42,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:14:42,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1763 transitions. [2020-10-29 13:14:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:14:42,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:42,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:42,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:14:42,616 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:42,617 INFO L82 PathProgramCache]: Analyzing trace with hash -306303547, now seen corresponding path program 1 times [2020-10-29 13:14:42,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:42,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548876597] [2020-10-29 13:14:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:42,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:42,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:42,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:42,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:42,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:42,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:43,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:43,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:43,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:43,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:47,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:47,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:14:47,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:14:47,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4526 [2020-10-29 13:14:47,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:47,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:47,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:47,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:14:47,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 13:14:47,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:47,453 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:47,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:47,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:47,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:47,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:47,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:47,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:14:47,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:47,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:47,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:47,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:47,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:47,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:47,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548876597] [2020-10-29 13:14:47,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:47,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:14:47,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350791083] [2020-10-29 13:14:47,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:47,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:47,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:47,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:47,486 INFO L87 Difference]: Start difference. First operand 1192 states and 1763 transitions. Second operand 6 states. [2020-10-29 13:14:47,786 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:14:48,749 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:14:49,061 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:14:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:49,921 INFO L93 Difference]: Finished difference Result 1389 states and 2048 transitions. [2020-10-29 13:14:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:14:49,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-29 13:14:49,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:49,929 INFO L225 Difference]: With dead ends: 1389 [2020-10-29 13:14:49,929 INFO L226 Difference]: Without dead ends: 1379 [2020-10-29 13:14:49,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:14:49,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2020-10-29 13:14:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1184. [2020-10-29 13:14:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2020-10-29 13:14:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1754 transitions. [2020-10-29 13:14:50,106 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1754 transitions. Word has length 55 [2020-10-29 13:14:50,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:50,106 INFO L481 AbstractCegarLoop]: Abstraction has 1184 states and 1754 transitions. [2020-10-29 13:14:50,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:50,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1754 transitions. [2020-10-29 13:14:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:14:50,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:50,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:50,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:14:50,108 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:50,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:50,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1158421159, now seen corresponding path program 1 times [2020-10-29 13:14:50,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:50,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753256713] [2020-10-29 13:14:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:50,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:50,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:51,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:51,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:14:51,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:14:51,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 953 [2020-10-29 13:14:51,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:51,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:51,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:51,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:14:51,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:14:51,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:51,387 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:51,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:51,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:51,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:51,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:51,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:51,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:14:51,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:51,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:51,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:14:51,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:51,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:14:51,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:51,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753256713] [2020-10-29 13:14:51,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:51,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:14:51,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685942495] [2020-10-29 13:14:51,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:51,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:51,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:51,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:51,430 INFO L87 Difference]: Start difference. First operand 1184 states and 1754 transitions. Second operand 6 states. [2020-10-29 13:14:51,767 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:14:52,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:52,405 INFO L93 Difference]: Finished difference Result 1428 states and 2137 transitions. [2020-10-29 13:14:52,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:14:52,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-29 13:14:52,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:52,408 INFO L225 Difference]: With dead ends: 1428 [2020-10-29 13:14:52,408 INFO L226 Difference]: Without dead ends: 617 [2020-10-29 13:14:52,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:52,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2020-10-29 13:14:52,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 356. [2020-10-29 13:14:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-29 13:14:52,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 500 transitions. [2020-10-29 13:14:52,466 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 500 transitions. Word has length 55 [2020-10-29 13:14:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:52,466 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 500 transitions. [2020-10-29 13:14:52,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 500 transitions. [2020-10-29 13:14:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:14:52,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:52,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:52,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:14:52,468 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:52,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:52,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1591342540, now seen corresponding path program 1 times [2020-10-29 13:14:52,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:52,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584210391] [2020-10-29 13:14:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:52,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:52,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:53,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:53,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:14:53,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:14:53,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 667 [2020-10-29 13:14:53,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:53,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:14:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:14:53,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:53,570 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:53,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:53,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:53,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:53,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:53,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:53,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:14:53,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:53,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:53,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:53,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:53,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584210391] [2020-10-29 13:14:53,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:53,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:14:53,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99628198] [2020-10-29 13:14:53,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:14:53,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:53,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:14:53,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:53,602 INFO L87 Difference]: Start difference. First operand 356 states and 500 transitions. Second operand 9 states. [2020-10-29 13:14:53,904 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:14:54,924 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:14:55,217 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-29 13:14:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:55,248 INFO L93 Difference]: Finished difference Result 622 states and 901 transitions. [2020-10-29 13:14:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:14:55,249 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-29 13:14:55,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:55,252 INFO L225 Difference]: With dead ends: 622 [2020-10-29 13:14:55,252 INFO L226 Difference]: Without dead ends: 615 [2020-10-29 13:14:55,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:14:55,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2020-10-29 13:14:55,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 351. [2020-10-29 13:14:55,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-29 13:14:55,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 493 transitions. [2020-10-29 13:14:55,316 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 493 transitions. Word has length 55 [2020-10-29 13:14:55,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:55,316 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 493 transitions. [2020-10-29 13:14:55,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:14:55,316 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 493 transitions. [2020-10-29 13:14:55,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:14:55,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:55,318 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] [2020-10-29 13:14:55,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:14:55,318 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:55,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:55,319 INFO L82 PathProgramCache]: Analyzing trace with hash -710162475, now seen corresponding path program 1 times [2020-10-29 13:14:55,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:55,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829482920] [2020-10-29 13:14:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:55,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:56,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:57,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:57,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:57,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:57,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:58,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:00,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:15:00,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:15:00,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:15:00,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:00,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:00,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:15:00,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:15:00,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:15:00,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:00,647 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:00,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:00,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:00,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:00,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:00,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:15:00,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:00,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:00,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:00,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:00,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:00,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:00,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829482920] [2020-10-29 13:15:00,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:00,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:15:00,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116735850] [2020-10-29 13:15:00,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:15:00,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:00,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:15:00,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:15:00,680 INFO L87 Difference]: Start difference. First operand 351 states and 493 transitions. Second operand 6 states. [2020-10-29 13:15:01,021 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:15:02,167 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:15:02,465 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:15:02,792 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:15:03,083 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:15:03,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:03,163 INFO L93 Difference]: Finished difference Result 784 states and 1145 transitions. [2020-10-29 13:15:03,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:15:03,164 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 13:15:03,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:03,166 INFO L225 Difference]: With dead ends: 784 [2020-10-29 13:15:03,166 INFO L226 Difference]: Without dead ends: 540 [2020-10-29 13:15:03,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:15:03,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2020-10-29 13:15:03,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 528. [2020-10-29 13:15:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528 states. [2020-10-29 13:15:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 756 transitions. [2020-10-29 13:15:03,257 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 756 transitions. Word has length 73 [2020-10-29 13:15:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:03,257 INFO L481 AbstractCegarLoop]: Abstraction has 528 states and 756 transitions. [2020-10-29 13:15:03,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:03,257 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 756 transitions. [2020-10-29 13:15:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:15:03,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:03,259 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] [2020-10-29 13:15:03,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:15:03,260 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:03,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:03,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1850514186, now seen corresponding path program 1 times [2020-10-29 13:15:03,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:03,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150957814] [2020-10-29 13:15:03,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:03,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:04,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:04,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:04,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:04,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:04,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:04,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:08,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:08,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:15:08,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:15:08,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:15:08,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:08,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:08,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:15:08,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:15:08,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:15:08,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:08,584 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:08,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:08,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:08,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:08,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:08,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:08,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:15:08,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:08,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:08,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:08,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:08,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:08,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:08,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150957814] [2020-10-29 13:15:08,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:08,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:15:08,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217313763] [2020-10-29 13:15:08,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:15:08,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:08,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:15:08,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:15:08,614 INFO L87 Difference]: Start difference. First operand 528 states and 756 transitions. Second operand 6 states. [2020-10-29 13:15:08,941 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:15:09,918 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:15:10,191 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:15:10,527 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:15:10,834 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:15:10,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:10,998 INFO L93 Difference]: Finished difference Result 2916 states and 4446 transitions. [2020-10-29 13:15:10,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:15:10,998 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 13:15:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:11,008 INFO L225 Difference]: With dead ends: 2916 [2020-10-29 13:15:11,008 INFO L226 Difference]: Without dead ends: 2518 [2020-10-29 13:15:11,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:15:11,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2020-10-29 13:15:11,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 923. [2020-10-29 13:15:11,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2020-10-29 13:15:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1349 transitions. [2020-10-29 13:15:11,204 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1349 transitions. Word has length 73 [2020-10-29 13:15:11,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:11,204 INFO L481 AbstractCegarLoop]: Abstraction has 923 states and 1349 transitions. [2020-10-29 13:15:11,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:11,204 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1349 transitions. [2020-10-29 13:15:11,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:15:11,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:11,207 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] [2020-10-29 13:15:11,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:15:11,207 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:11,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:11,208 INFO L82 PathProgramCache]: Analyzing trace with hash 326948198, now seen corresponding path program 1 times [2020-10-29 13:15:11,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:11,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061678876] [2020-10-29 13:15:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:11,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:12,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:12,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:16,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:16,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:16,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:15:16,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:15:16,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:15:16,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:16,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:16,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:15:16,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:15:16,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:15:16,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:16,565 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:16,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:16,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:16,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:16,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:16,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:16,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:15:16,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:16,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:16,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:16,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:16,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061678876] [2020-10-29 13:15:16,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:16,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:15:16,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873512555] [2020-10-29 13:15:16,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:15:16,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:16,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:15:16,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:15:16,602 INFO L87 Difference]: Start difference. First operand 923 states and 1349 transitions. Second operand 5 states. [2020-10-29 13:15:16,962 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:15:17,980 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:15:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:18,086 INFO L93 Difference]: Finished difference Result 2281 states and 3395 transitions. [2020-10-29 13:15:18,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:15:18,086 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-29 13:15:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:18,093 INFO L225 Difference]: With dead ends: 2281 [2020-10-29 13:15:18,093 INFO L226 Difference]: Without dead ends: 1488 [2020-10-29 13:15:18,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:15:18,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2020-10-29 13:15:18,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1467. [2020-10-29 13:15:18,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1467 states. [2020-10-29 13:15:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 2125 transitions. [2020-10-29 13:15:18,398 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 2125 transitions. Word has length 75 [2020-10-29 13:15:18,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:18,398 INFO L481 AbstractCegarLoop]: Abstraction has 1467 states and 2125 transitions. [2020-10-29 13:15:18,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:15:18,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 2125 transitions. [2020-10-29 13:15:18,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:15:18,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:18,402 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] [2020-10-29 13:15:18,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:15:18,402 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:18,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:18,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1906720226, now seen corresponding path program 1 times [2020-10-29 13:15:18,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:18,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531710753] [2020-10-29 13:15:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:18,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:18,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:18,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:18,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:18,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:18,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:19,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:19,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:21,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:23,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:23,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:15:23,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:15:23,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:15:23,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:23,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:23,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:15:23,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:15:23,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:15:23,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:23,797 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:23,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:23,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:23,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:23,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:23,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:23,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:15:23,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:23,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:23,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:23,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:23,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:23,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:23,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531710753] [2020-10-29 13:15:23,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:23,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:15:23,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734750031] [2020-10-29 13:15:23,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:15:23,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:23,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:15:23,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:15:23,850 INFO L87 Difference]: Start difference. First operand 1467 states and 2125 transitions. Second operand 6 states. [2020-10-29 13:15:24,159 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:15:25,206 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:15:25,498 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:15:25,877 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:15:26,193 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:15:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:26,501 INFO L93 Difference]: Finished difference Result 4927 states and 7283 transitions. [2020-10-29 13:15:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:15:26,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-29 13:15:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:26,532 INFO L225 Difference]: With dead ends: 4927 [2020-10-29 13:15:26,532 INFO L226 Difference]: Without dead ends: 3598 [2020-10-29 13:15:26,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:15:26,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2020-10-29 13:15:26,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 1467. [2020-10-29 13:15:26,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1467 states. [2020-10-29 13:15:26,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 2107 transitions. [2020-10-29 13:15:26,834 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 2107 transitions. Word has length 75 [2020-10-29 13:15:26,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:26,835 INFO L481 AbstractCegarLoop]: Abstraction has 1467 states and 2107 transitions. [2020-10-29 13:15:26,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:26,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 2107 transitions. [2020-10-29 13:15:26,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:15:26,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:26,837 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] [2020-10-29 13:15:26,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:15:26,837 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:26,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:26,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1318076819, now seen corresponding path program 1 times [2020-10-29 13:15:26,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:26,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317664223] [2020-10-29 13:15:26,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:26,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:26,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:26,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:26,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:27,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:27,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:29,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:29,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:29,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:29,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:29,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:29,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:29,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:29,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:30,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:30,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:30,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:31,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:31,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:15:31,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:15:31,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:15:31,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:31,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:31,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:15:31,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 13:15:31,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:15:31,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:32,182 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:32,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:32,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:32,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:32,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:32,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:32,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:15:32,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:32,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:32,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:32,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317664223] [2020-10-29 13:15:32,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:32,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:15:32,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935222344] [2020-10-29 13:15:32,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:15:32,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:32,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:15:32,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:15:32,215 INFO L87 Difference]: Start difference. First operand 1467 states and 2107 transitions. Second operand 8 states. [2020-10-29 13:15:32,516 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:15:33,811 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:15:34,158 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:15:34,469 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:15:34,796 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:15:36,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:36,213 INFO L93 Difference]: Finished difference Result 9529 states and 13891 transitions. [2020-10-29 13:15:36,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:15:36,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-10-29 13:15:36,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:36,228 INFO L225 Difference]: With dead ends: 9529 [2020-10-29 13:15:36,228 INFO L226 Difference]: Without dead ends: 8200 [2020-10-29 13:15:36,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2020-10-29 13:15:36,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8200 states. [2020-10-29 13:15:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8200 to 3153. [2020-10-29 13:15:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3153 states. [2020-10-29 13:15:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 4635 transitions. [2020-10-29 13:15:36,794 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 4635 transitions. Word has length 75 [2020-10-29 13:15:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:36,794 INFO L481 AbstractCegarLoop]: Abstraction has 3153 states and 4635 transitions. [2020-10-29 13:15:36,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:15:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 4635 transitions. [2020-10-29 13:15:36,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:15:36,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:36,802 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] [2020-10-29 13:15:36,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:15:36,803 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:36,804 INFO L82 PathProgramCache]: Analyzing trace with hash 557072493, now seen corresponding path program 1 times [2020-10-29 13:15:36,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:36,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815658645] [2020-10-29 13:15:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:36,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:36,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:36,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:36,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:36,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:37,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:38,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:38,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:38,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:38,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:39,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:41,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:41,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:15:41,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:15:41,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:15:41,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:41,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:41,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:15:41,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:15:41,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 13:15:41,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:42,189 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:42,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:42,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:42,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:42,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:42,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:15:42,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:42,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:42,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:15:42,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:42,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:15:42,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:42,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815658645] [2020-10-29 13:15:42,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:42,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:15:42,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625763385] [2020-10-29 13:15:42,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:15:42,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:42,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:15:42,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:15:42,236 INFO L87 Difference]: Start difference. First operand 3153 states and 4635 transitions. Second operand 8 states. [2020-10-29 13:15:42,579 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:15:43,877 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:15:44,177 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:15:45,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:45,348 INFO L93 Difference]: Finished difference Result 10388 states and 15430 transitions. [2020-10-29 13:15:45,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:15:45,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-10-29 13:15:45,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:45,366 INFO L225 Difference]: With dead ends: 10388 [2020-10-29 13:15:45,366 INFO L226 Difference]: Without dead ends: 7373 [2020-10-29 13:15:45,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:15:45,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7373 states. [2020-10-29 13:15:46,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7373 to 5037. [2020-10-29 13:15:46,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5037 states. [2020-10-29 13:15:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5037 states to 5037 states and 7513 transitions. [2020-10-29 13:15:46,412 INFO L78 Accepts]: Start accepts. Automaton has 5037 states and 7513 transitions. Word has length 75 [2020-10-29 13:15:46,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:46,412 INFO L481 AbstractCegarLoop]: Abstraction has 5037 states and 7513 transitions. [2020-10-29 13:15:46,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:15:46,413 INFO L276 IsEmpty]: Start isEmpty. Operand 5037 states and 7513 transitions. [2020-10-29 13:15:46,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:15:46,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:46,417 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] [2020-10-29 13:15:46,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:15:46,417 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:46,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:46,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1486258980, now seen corresponding path program 1 times [2020-10-29 13:15:46,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:46,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434009747] [2020-10-29 13:15:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:46,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:46,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:46,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:46,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:46,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:47,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:47,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:49,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:49,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:51,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:51,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:15:51,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:15:51,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:15:51,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:51,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:51,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:15:51,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:15:51,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 13:15:51,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:51,794 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:51,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:51,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:51,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:51,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:51,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:51,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:15:51,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:51,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:51,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:51,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:51,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:51,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:51,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434009747] [2020-10-29 13:15:51,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:51,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:15:51,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408822706] [2020-10-29 13:15:51,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:15:51,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:51,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:15:51,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:15:51,843 INFO L87 Difference]: Start difference. First operand 5037 states and 7513 transitions. Second operand 6 states. [2020-10-29 13:15:52,156 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:15:53,146 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:15:53,422 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:15:54,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:54,529 INFO L93 Difference]: Finished difference Result 11810 states and 17773 transitions. [2020-10-29 13:15:54,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:15:54,530 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:15:54,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:54,550 INFO L225 Difference]: With dead ends: 11810 [2020-10-29 13:15:54,550 INFO L226 Difference]: Without dead ends: 8219 [2020-10-29 13:15:54,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:15:54,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8219 states. [2020-10-29 13:15:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8219 to 8141. [2020-10-29 13:15:55,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8141 states. [2020-10-29 13:15:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8141 states to 8141 states and 12035 transitions. [2020-10-29 13:15:55,915 INFO L78 Accepts]: Start accepts. Automaton has 8141 states and 12035 transitions. Word has length 76 [2020-10-29 13:15:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:55,915 INFO L481 AbstractCegarLoop]: Abstraction has 8141 states and 12035 transitions. [2020-10-29 13:15:55,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 8141 states and 12035 transitions. [2020-10-29 13:15:55,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:15:55,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:55,918 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] [2020-10-29 13:15:55,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:15:55,919 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:55,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:55,919 INFO L82 PathProgramCache]: Analyzing trace with hash -892048925, now seen corresponding path program 1 times [2020-10-29 13:15:55,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:55,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202608048] [2020-10-29 13:15:55,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:55,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:55,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:55,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:56,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:56,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:56,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:56,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:56,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:57,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:57,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:57,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:00,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:00,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:16:00,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:16:00,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:16:00,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:00,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:00,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:00,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:16:00,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:16:00,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:01,240 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:01,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:01,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:01,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:01,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:01,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:01,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:16:01,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:01,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:01,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:01,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:01,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:01,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:01,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202608048] [2020-10-29 13:16:01,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:01,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:16:01,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978616625] [2020-10-29 13:16:01,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:01,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:01,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:01,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:01,265 INFO L87 Difference]: Start difference. First operand 8141 states and 12035 transitions. Second operand 6 states. [2020-10-29 13:16:01,590 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:16:03,422 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:16:03,760 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:16:04,123 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:16:07,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:07,778 INFO L93 Difference]: Finished difference Result 38266 states and 56813 transitions. [2020-10-29 13:16:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:16:07,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:16:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:07,851 INFO L225 Difference]: With dead ends: 38266 [2020-10-29 13:16:07,851 INFO L226 Difference]: Without dead ends: 30435 [2020-10-29 13:16:07,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:16:07,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30435 states. [2020-10-29 13:16:11,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30435 to 18919. [2020-10-29 13:16:11,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18919 states. [2020-10-29 13:16:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18919 states to 18919 states and 27903 transitions. [2020-10-29 13:16:11,618 INFO L78 Accepts]: Start accepts. Automaton has 18919 states and 27903 transitions. Word has length 76 [2020-10-29 13:16:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:11,618 INFO L481 AbstractCegarLoop]: Abstraction has 18919 states and 27903 transitions. [2020-10-29 13:16:11,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:11,618 INFO L276 IsEmpty]: Start isEmpty. Operand 18919 states and 27903 transitions. [2020-10-29 13:16:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:16:11,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:11,628 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] [2020-10-29 13:16:11,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 13:16:11,629 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:11,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1767401084, now seen corresponding path program 1 times [2020-10-29 13:16:11,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:11,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080962035] [2020-10-29 13:16:11,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:11,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:11,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:11,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:11,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:12,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:12,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:13,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:16,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:16,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:16:16,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:16:16,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:16:16,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:16,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:16,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:16:16,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:16:16,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:16:16,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:16,995 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:16,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:17,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:17,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:17,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:17,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:17,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:16:17,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:17,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:17,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:17,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:17,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:17,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:17,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080962035] [2020-10-29 13:16:17,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:17,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:16:17,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530244446] [2020-10-29 13:16:17,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:16:17,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:17,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:16:17,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:16:17,027 INFO L87 Difference]: Start difference. First operand 18919 states and 27903 transitions. Second operand 8 states. [2020-10-29 13:16:17,374 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:16:18,726 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:16:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:25,016 INFO L93 Difference]: Finished difference Result 57123 states and 83934 transitions. [2020-10-29 13:16:25,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:16:25,019 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-10-29 13:16:25,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:25,075 INFO L225 Difference]: With dead ends: 57123 [2020-10-29 13:16:25,075 INFO L226 Difference]: Without dead ends: 38427 [2020-10-29 13:16:25,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:16:25,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38427 states. [2020-10-29 13:16:28,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38427 to 18919. [2020-10-29 13:16:28,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18919 states. [2020-10-29 13:16:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18919 states to 18919 states and 27900 transitions. [2020-10-29 13:16:28,731 INFO L78 Accepts]: Start accepts. Automaton has 18919 states and 27900 transitions. Word has length 76 [2020-10-29 13:16:28,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:28,731 INFO L481 AbstractCegarLoop]: Abstraction has 18919 states and 27900 transitions. [2020-10-29 13:16:28,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:16:28,731 INFO L276 IsEmpty]: Start isEmpty. Operand 18919 states and 27900 transitions. [2020-10-29 13:16:28,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:16:28,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:28,890 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] [2020-10-29 13:16:28,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 13:16:28,890 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:28,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:28,890 INFO L82 PathProgramCache]: Analyzing trace with hash 508295425, now seen corresponding path program 1 times [2020-10-29 13:16:28,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:28,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653067613] [2020-10-29 13:16:28,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:28,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:28,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:29,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:29,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:29,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:29,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:16:29,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:16:29,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1080 [2020-10-29 13:16:29,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:29,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:29,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:29,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-29 13:16:29,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 13:16:29,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:30,277 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:30,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:30,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:30,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:30,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:30,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:30,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:16:30,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:30,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:30,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:30,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:30,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:30,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:30,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653067613] [2020-10-29 13:16:30,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:30,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:16:30,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260982195] [2020-10-29 13:16:30,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:16:30,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:30,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:16:30,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:16:30,302 INFO L87 Difference]: Start difference. First operand 18919 states and 27900 transitions. Second operand 4 states. [2020-10-29 13:16:30,588 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:16:34,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:34,354 INFO L93 Difference]: Finished difference Result 35191 states and 51514 transitions. [2020-10-29 13:16:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:16:34,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-29 13:16:34,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:34,376 INFO L225 Difference]: With dead ends: 35191 [2020-10-29 13:16:34,376 INFO L226 Difference]: Without dead ends: 16555 [2020-10-29 13:16:34,401 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 [2020-10-29 13:16:34,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16555 states. [2020-10-29 13:16:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16555 to 13688. [2020-10-29 13:16:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13688 states. [2020-10-29 13:16:37,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13688 states to 13688 states and 19507 transitions. [2020-10-29 13:16:37,157 INFO L78 Accepts]: Start accepts. Automaton has 13688 states and 19507 transitions. Word has length 78 [2020-10-29 13:16:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:37,157 INFO L481 AbstractCegarLoop]: Abstraction has 13688 states and 19507 transitions. [2020-10-29 13:16:37,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:16:37,157 INFO L276 IsEmpty]: Start isEmpty. Operand 13688 states and 19507 transitions. [2020-10-29 13:16:37,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 13:16:37,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:37,159 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] [2020-10-29 13:16:37,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 13:16:37,159 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:37,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:37,160 INFO L82 PathProgramCache]: Analyzing trace with hash -425606350, now seen corresponding path program 1 times [2020-10-29 13:16:37,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:37,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342619025] [2020-10-29 13:16:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:37,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:37,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:37,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:37,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:37,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 13:16:37,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:16:37,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-29 13:16:37,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:37,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:37,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:37,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-29 13:16:37,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 13:16:37,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:38,110 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:38,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:38,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:38,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:38,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:38,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:38,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:16:38,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:38,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:38,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:38,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:38,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:38,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:38,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342619025] [2020-10-29 13:16:38,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:38,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:16:38,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257903974] [2020-10-29 13:16:38,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:16:38,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:38,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:16:38,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:16:38,139 INFO L87 Difference]: Start difference. First operand 13688 states and 19507 transitions. Second operand 4 states. [2020-10-29 13:16:38,429 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:16:43,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:43,918 INFO L93 Difference]: Finished difference Result 38710 states and 54671 transitions. [2020-10-29 13:16:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:16:43,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-29 13:16:43,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:43,952 INFO L225 Difference]: With dead ends: 38710 [2020-10-29 13:16:43,953 INFO L226 Difference]: Without dead ends: 25193 [2020-10-29 13:16:43,976 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 [2020-10-29 13:16:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25193 states. [2020-10-29 13:16:48,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25193 to 22740. [2020-10-29 13:16:48,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22740 states. [2020-10-29 13:16:48,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22740 states to 22740 states and 31805 transitions. [2020-10-29 13:16:48,872 INFO L78 Accepts]: Start accepts. Automaton has 22740 states and 31805 transitions. Word has length 79 [2020-10-29 13:16:48,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:48,873 INFO L481 AbstractCegarLoop]: Abstraction has 22740 states and 31805 transitions. [2020-10-29 13:16:48,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:16:48,873 INFO L276 IsEmpty]: Start isEmpty. Operand 22740 states and 31805 transitions. [2020-10-29 13:16:48,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:16:48,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:48,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:48,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 13:16:48,875 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:48,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:48,875 INFO L82 PathProgramCache]: Analyzing trace with hash 787939086, now seen corresponding path program 1 times [2020-10-29 13:16:48,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:48,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62316098] [2020-10-29 13:16:48,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:48,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:48,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:49,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:49,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:49,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:49,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:49,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:50,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:50,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:50,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:53,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:53,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:53,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:16:53,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:16:53,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:16:53,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:53,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:53,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:53,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:16:53,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:16:53,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:54,194 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:54,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:54,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:54,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:54,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:54,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:54,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:16:54,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:54,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:54,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:54,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:54,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:16:54,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:54,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62316098] [2020-10-29 13:16:54,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:54,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:16:54,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393081673] [2020-10-29 13:16:54,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:54,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:54,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:54,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:54,239 INFO L87 Difference]: Start difference. First operand 22740 states and 31805 transitions. Second operand 6 states. [2020-10-29 13:16:54,554 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 170