/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-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:51:26,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:51:26,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:51:26,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:51:26,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:51:26,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:51:26,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:51:26,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:51:26,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:51:26,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:51:26,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:51:26,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:51:26,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:51:26,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:51:26,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:51:26,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:51:26,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:51:26,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:51:26,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:51:26,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:51:26,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:51:26,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:51:26,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:51:26,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:51:26,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:51:26,225 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:51:26,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:51:26,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:51:26,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:51:26,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:51:26,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:51:26,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:51:26,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:51:26,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:51:26,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:51:26,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:51:26,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:51:26,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:51:26,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:51:26,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:51:26,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:51:26,242 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 13:51:26,298 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:51:26,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:51:26,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:51:26,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:51:26,301 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:51:26,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:51:26,303 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:51:26,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:51:26,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:51:26,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:51:26,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:51:26,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:51:26,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:51:26,305 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:51:26,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:51:26,306 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:51:26,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:51:26,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:51:26,306 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:51:26,306 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:51:26,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:51:26,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:51:26,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:51:26,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:51:26,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:51:26,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:51:26,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:51:26,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:51:26,308 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:51:26,308 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:51:26,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:51:26,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:51:26,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:51:26,748 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:51:26,749 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:51:26,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:51:26,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00a6c444b/d4ffab9978874964b36d9fca2d740b67/FLAG323aec93a [2020-10-29 13:51:27,483 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:51:27,483 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:51:27,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00a6c444b/d4ffab9978874964b36d9fca2d740b67/FLAG323aec93a [2020-10-29 13:51:27,795 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00a6c444b/d4ffab9978874964b36d9fca2d740b67 [2020-10-29 13:51:27,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:51:27,806 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:51:27,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:51:27,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:51:27,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:51:27,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:51:27" (1/1) ... [2020-10-29 13:51:27,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4623ecad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:27, skipping insertion in model container [2020-10-29 13:51:27,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:51:27" (1/1) ... [2020-10-29 13:51:27,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:51:27,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:51:28,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:51:28,297 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:51:28,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:51:28,422 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:51:28,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:28 WrapperNode [2020-10-29 13:51:28,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:51:28,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:51:28,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:51:28,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:51:28,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:28" (1/1) ... [2020-10-29 13:51:28,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:28" (1/1) ... [2020-10-29 13:51:28,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:28" (1/1) ... [2020-10-29 13:51:28,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:28" (1/1) ... [2020-10-29 13:51:28,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:28" (1/1) ... [2020-10-29 13:51:28,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:28" (1/1) ... [2020-10-29 13:51:28,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:28" (1/1) ... [2020-10-29 13:51:28,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:51:28,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:51:28,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:51:28,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:51:28,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:28" (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 13:51:28,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:51:28,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:51:28,623 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:51:28,623 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:51:28,623 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:51:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:51:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:51:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:51:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:51:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:51:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:51:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:51:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:51:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:51:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:51:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:51:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:51:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:51:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:51:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:51:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:51:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:51:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:51:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:51:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:51:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:51:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:51:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:51:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:51:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:51:29,665 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:51:29,665 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:51:29,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:51:29 BoogieIcfgContainer [2020-10-29 13:51:29,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:51:29,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:51:29,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:51:29,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:51:29,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:51:27" (1/3) ... [2020-10-29 13:51:29,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c01464a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:51:29, skipping insertion in model container [2020-10-29 13:51:29,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:28" (2/3) ... [2020-10-29 13:51:29,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c01464a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:51:29, skipping insertion in model container [2020-10-29 13:51:29,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:51:29" (3/3) ... [2020-10-29 13:51:29,676 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:51:29,688 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:51:29,693 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:51:29,707 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:51:29,734 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:51:29,734 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:51:29,735 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:51:29,735 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:51:29,735 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:51:29,735 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:51:29,735 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:51:29,735 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:51:29,757 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-10-29 13:51:29,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:51:29,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:29,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:51:29,769 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:29,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:29,776 INFO L82 PathProgramCache]: Analyzing trace with hash 115916313, now seen corresponding path program 1 times [2020-10-29 13:51:29,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:29,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80098749] [2020-10-29 13:51:29,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:30,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:30,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:30,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:35,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:35,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:51:35,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:51:35,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-29 13:51:35,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:35,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:35,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:51:35,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:51:35,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 13:51:35,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:51:35,652 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:51:35,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:35,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:35,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:35,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:35,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:35,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:51:35,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:35,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:35,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:51:35,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:35,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:51:35,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:51:35,722 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 13:51:35,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80098749] [2020-10-29 13:51:35,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:51:35,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:51:35,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701603276] [2020-10-29 13:51:35,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:51:35,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:35,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:51:35,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:51:35,751 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 8 states. [2020-10-29 13:51:36,135 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:51:37,539 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:51:37,844 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:51:38,186 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:51:38,529 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:51:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:38,985 INFO L93 Difference]: Finished difference Result 849 states and 1366 transitions. [2020-10-29 13:51:38,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:51:38,988 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 84 [2020-10-29 13:51:38,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:39,031 INFO L225 Difference]: With dead ends: 849 [2020-10-29 13:51:39,031 INFO L226 Difference]: Without dead ends: 723 [2020-10-29 13:51:39,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:51:39,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2020-10-29 13:51:39,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 319. [2020-10-29 13:51:39,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-29 13:51:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 476 transitions. [2020-10-29 13:51:39,133 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 476 transitions. Word has length 84 [2020-10-29 13:51:39,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:51:39,136 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 476 transitions. [2020-10-29 13:51:39,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:51:39,136 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 476 transitions. [2020-10-29 13:51:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 13:51:39,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:39,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:51:39,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:51:39,146 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:39,147 INFO L82 PathProgramCache]: Analyzing trace with hash -216084163, now seen corresponding path program 1 times [2020-10-29 13:51:39,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:39,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343938787] [2020-10-29 13:51:39,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:39,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:39,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:40,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:40,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 13:51:40,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:51:40,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1287 [2020-10-29 13:51:40,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:40,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:40,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:51:40,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:51:40,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 13:51:40,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-29 13:51:40,922 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:51:40,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:40,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:40,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:40,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:40,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:40,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:51:40,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:40,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:40,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:51:40,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:40,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:51:40,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:41,004 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 13:51:41,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343938787] [2020-10-29 13:51:41,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:51:41,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:51:41,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23359734] [2020-10-29 13:51:41,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:51:41,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:41,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:51:41,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:51:41,008 INFO L87 Difference]: Start difference. First operand 319 states and 476 transitions. Second operand 8 states. [2020-10-29 13:51:42,389 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:51:42,703 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:51:43,019 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:51:43,348 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:51:43,728 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:51:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:44,454 INFO L93 Difference]: Finished difference Result 1380 states and 2134 transitions. [2020-10-29 13:51:44,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:51:44,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-10-29 13:51:44,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:44,462 INFO L225 Difference]: With dead ends: 1380 [2020-10-29 13:51:44,463 INFO L226 Difference]: Without dead ends: 1141 [2020-10-29 13:51:44,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:51:44,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2020-10-29 13:51:44,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1129. [2020-10-29 13:51:44,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1129 states. [2020-10-29 13:51:44,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1741 transitions. [2020-10-29 13:51:44,585 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1741 transitions. Word has length 85 [2020-10-29 13:51:44,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:51:44,586 INFO L481 AbstractCegarLoop]: Abstraction has 1129 states and 1741 transitions. [2020-10-29 13:51:44,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:51:44,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1741 transitions. [2020-10-29 13:51:44,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:51:44,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:44,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:51:44,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:51:44,591 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:44,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:44,592 INFO L82 PathProgramCache]: Analyzing trace with hash -119913713, now seen corresponding path program 1 times [2020-10-29 13:51:44,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:44,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453645533] [2020-10-29 13:51:44,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:44,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:44,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:45,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:45,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:51:45,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:51:45,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-29 13:51:45,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:45,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:45,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:51:45,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:51:45,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:51:45,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:51:45,680 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:51:45,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:45,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:45,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:45,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:45,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:45,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 13:51:45,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:45,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:45,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:51:45,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:45,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:51:45,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:51:45,750 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 13:51:45,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453645533] [2020-10-29 13:51:45,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:51:45,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:51:45,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131175531] [2020-10-29 13:51:45,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:51:45,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:45,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:51:45,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:51:45,753 INFO L87 Difference]: Start difference. First operand 1129 states and 1741 transitions. Second operand 6 states. [2020-10-29 13:51:46,067 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:51:46,995 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:51:47,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:47,474 INFO L93 Difference]: Finished difference Result 2908 states and 4539 transitions. [2020-10-29 13:51:47,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:51:47,474 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-29 13:51:47,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:47,487 INFO L225 Difference]: With dead ends: 2908 [2020-10-29 13:51:47,488 INFO L226 Difference]: Without dead ends: 1890 [2020-10-29 13:51:47,493 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 13:51:47,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2020-10-29 13:51:47,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1887. [2020-10-29 13:51:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1887 states. [2020-10-29 13:51:47,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2922 transitions. [2020-10-29 13:51:47,644 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2922 transitions. Word has length 86 [2020-10-29 13:51:47,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:51:47,645 INFO L481 AbstractCegarLoop]: Abstraction has 1887 states and 2922 transitions. [2020-10-29 13:51:47,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:51:47,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2922 transitions. [2020-10-29 13:51:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:51:47,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:47,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:51:47,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:51:47,654 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:47,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:47,655 INFO L82 PathProgramCache]: Analyzing trace with hash -610650146, now seen corresponding path program 1 times [2020-10-29 13:51:47,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:47,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707121750] [2020-10-29 13:51:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:47,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:47,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:48,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:48,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:51:48,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:51:48,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 692 [2020-10-29 13:51:48,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:48,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:48,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:51:48,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:51:48,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:51:48,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:48,698 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:51:48,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:48,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:48,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:48,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:48,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:48,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 13:51:48,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:48,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:48,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:51:48,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:48,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:51:48,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:51:48,777 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 13:51:48,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707121750] [2020-10-29 13:51:48,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:51:48,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:51:48,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509944734] [2020-10-29 13:51:48,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:51:48,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:48,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:51:48,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:51:48,783 INFO L87 Difference]: Start difference. First operand 1887 states and 2922 transitions. Second operand 6 states. [2020-10-29 13:51:49,111 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:51:50,116 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:51:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:50,825 INFO L93 Difference]: Finished difference Result 5140 states and 8049 transitions. [2020-10-29 13:51:50,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:51:50,826 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-29 13:51:50,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:50,846 INFO L225 Difference]: With dead ends: 5140 [2020-10-29 13:51:50,846 INFO L226 Difference]: Without dead ends: 3398 [2020-10-29 13:51:50,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:51:50,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2020-10-29 13:51:51,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 3395. [2020-10-29 13:51:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3395 states. [2020-10-29 13:51:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3395 states to 3395 states and 5285 transitions. [2020-10-29 13:51:51,135 INFO L78 Accepts]: Start accepts. Automaton has 3395 states and 5285 transitions. Word has length 86 [2020-10-29 13:51:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:51:51,135 INFO L481 AbstractCegarLoop]: Abstraction has 3395 states and 5285 transitions. [2020-10-29 13:51:51,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:51:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 3395 states and 5285 transitions. [2020-10-29 13:51:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:51:51,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:51,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:51:51,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:51:51,143 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:51,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:51,144 INFO L82 PathProgramCache]: Analyzing trace with hash -340753856, now seen corresponding path program 1 times [2020-10-29 13:51:51,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:51,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166290792] [2020-10-29 13:51:51,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:51,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:51,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:51,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:51,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:51:51,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:51:51,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 677 [2020-10-29 13:51:51,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:51,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:51,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:51:51,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:51:51,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:51:51,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:52,195 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:51:52,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:52,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:52,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:52,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:52,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:52,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 13:51:52,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:52,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:52,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:51:52,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:52,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:51:52,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:51:52,265 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 13:51:52,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166290792] [2020-10-29 13:51:52,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:51:52,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:51:52,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690474671] [2020-10-29 13:51:52,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:51:52,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:52,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:51:52,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:51:52,269 INFO L87 Difference]: Start difference. First operand 3395 states and 5285 transitions. Second operand 6 states. [2020-10-29 13:51:52,581 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:51:53,509 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:51:54,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:54,365 INFO L93 Difference]: Finished difference Result 9740 states and 15212 transitions. [2020-10-29 13:51:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:51:54,366 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-29 13:51:54,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:54,403 INFO L225 Difference]: With dead ends: 9740 [2020-10-29 13:51:54,403 INFO L226 Difference]: Without dead ends: 6426 [2020-10-29 13:51:54,412 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 13:51:54,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6426 states. [2020-10-29 13:51:54,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6426 to 6423. [2020-10-29 13:51:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6423 states. [2020-10-29 13:51:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6423 states to 6423 states and 9965 transitions. [2020-10-29 13:51:54,902 INFO L78 Accepts]: Start accepts. Automaton has 6423 states and 9965 transitions. Word has length 86 [2020-10-29 13:51:54,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:51:54,903 INFO L481 AbstractCegarLoop]: Abstraction has 6423 states and 9965 transitions. [2020-10-29 13:51:54,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:51:54,903 INFO L276 IsEmpty]: Start isEmpty. Operand 6423 states and 9965 transitions. [2020-10-29 13:51:54,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:51:54,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:54,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:51:54,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:51:54,908 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:54,909 INFO L82 PathProgramCache]: Analyzing trace with hash -516639375, now seen corresponding path program 1 times [2020-10-29 13:51:54,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:54,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351755803] [2020-10-29 13:51:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:55,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:55,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:55,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:55,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:51:55,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:51:55,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-29 13:51:55,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:55,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:55,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:51:55,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:51:55,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:51:55,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:55,905 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:51:55,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:55,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:55,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:55,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:55,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:55,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 13:51:55,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:55,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:55,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:51:55,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:55,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:51:55,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:55,979 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 13:51:55,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351755803] [2020-10-29 13:51:55,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:51:55,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:51:55,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626663767] [2020-10-29 13:51:55,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:51:55,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:55,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:51:55,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:51:55,983 INFO L87 Difference]: Start difference. First operand 6423 states and 9965 transitions. Second operand 6 states. [2020-10-29 13:51:56,338 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:51:57,419 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:51:58,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:58,430 INFO L93 Difference]: Finished difference Result 18827 states and 29229 transitions. [2020-10-29 13:51:58,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:51:58,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-29 13:51:58,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:58,514 INFO L225 Difference]: With dead ends: 18827 [2020-10-29 13:51:58,515 INFO L226 Difference]: Without dead ends: 12462 [2020-10-29 13:51:58,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:51:58,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12462 states. [2020-10-29 13:51:59,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12462 to 12459. [2020-10-29 13:51:59,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12459 states. [2020-10-29 13:51:59,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12459 states to 12459 states and 19198 transitions. [2020-10-29 13:51:59,700 INFO L78 Accepts]: Start accepts. Automaton has 12459 states and 19198 transitions. Word has length 86 [2020-10-29 13:51:59,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:51:59,700 INFO L481 AbstractCegarLoop]: Abstraction has 12459 states and 19198 transitions. [2020-10-29 13:51:59,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:51:59,701 INFO L276 IsEmpty]: Start isEmpty. Operand 12459 states and 19198 transitions. [2020-10-29 13:51:59,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 13:51:59,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:59,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:51:59,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:51:59,707 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:59,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:59,707 INFO L82 PathProgramCache]: Analyzing trace with hash 2126842930, now seen corresponding path program 1 times [2020-10-29 13:51:59,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:59,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978398801] [2020-10-29 13:51:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:59,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:59,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:00,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:01,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:01,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 13:52:01,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:52:01,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1915 [2020-10-29 13:52:01,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:01,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:01,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:52:01,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:52:01,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 13:52:01,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:52:02,200 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:52:02,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:52:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:02,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:02,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:02,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:52:02,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:52:02,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:52:02,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:02,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:02,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:52:02,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:52:02,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:52:02,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:52:02,263 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 13:52:02,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978398801] [2020-10-29 13:52:02,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:52:02,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:52:02,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377243968] [2020-10-29 13:52:02,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:52:02,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:52:02,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:52:02,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:52:02,271 INFO L87 Difference]: Start difference. First operand 12459 states and 19198 transitions. Second operand 9 states. [2020-10-29 13:52:02,638 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:52:04,725 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:52:05,134 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:52:10,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:52:10,069 INFO L93 Difference]: Finished difference Result 56075 states and 86065 transitions. [2020-10-29 13:52:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 13:52:10,070 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 87 [2020-10-29 13:52:10,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:52:10,237 INFO L225 Difference]: With dead ends: 56075 [2020-10-29 13:52:10,237 INFO L226 Difference]: Without dead ends: 50872 [2020-10-29 13:52:10,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-10-29 13:52:10,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50872 states. [2020-10-29 13:52:12,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50872 to 12716. [2020-10-29 13:52:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12716 states. [2020-10-29 13:52:12,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12716 states to 12716 states and 19571 transitions. [2020-10-29 13:52:12,078 INFO L78 Accepts]: Start accepts. Automaton has 12716 states and 19571 transitions. Word has length 87 [2020-10-29 13:52:12,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:52:12,079 INFO L481 AbstractCegarLoop]: Abstraction has 12716 states and 19571 transitions. [2020-10-29 13:52:12,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:52:12,079 INFO L276 IsEmpty]: Start isEmpty. Operand 12716 states and 19571 transitions. [2020-10-29 13:52:12,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 13:52:12,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:52:12,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:52:12,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:52:12,086 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:52:12,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:52:12,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1977763986, now seen corresponding path program 1 times [2020-10-29 13:52:12,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:52:12,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518178299] [2020-10-29 13:52:12,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:52:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:12,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:12,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:12,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:14,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:14,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 13:52:14,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:52:14,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2453 [2020-10-29 13:52:14,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:14,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:14,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:52:14,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:52:14,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 13:52:14,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:52:14,781 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-29 13:52:15,078 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:52:15,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:52:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:15,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:15,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:15,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:52:15,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:52:15,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:52:15,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:15,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:15,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:52:15,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:52:15,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:52:15,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:52:15,133 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 13:52:15,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518178299] [2020-10-29 13:52:15,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:52:15,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:52:15,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270467244] [2020-10-29 13:52:15,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:52:15,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:52:15,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:52:15,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:52:15,138 INFO L87 Difference]: Start difference. First operand 12716 states and 19571 transitions. Second operand 9 states. [2020-10-29 13:52:15,512 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:52:18,212 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:52:18,607 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:52:23,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:52:23,729 INFO L93 Difference]: Finished difference Result 53849 states and 82568 transitions. [2020-10-29 13:52:23,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 13:52:23,730 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 87 [2020-10-29 13:52:23,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:52:23,888 INFO L225 Difference]: With dead ends: 53849 [2020-10-29 13:52:23,888 INFO L226 Difference]: Without dead ends: 52295 [2020-10-29 13:52:23,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-10-29 13:52:23,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52295 states. [2020-10-29 13:52:25,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52295 to 12716. [2020-10-29 13:52:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12716 states. [2020-10-29 13:52:25,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12716 states to 12716 states and 19569 transitions. [2020-10-29 13:52:25,490 INFO L78 Accepts]: Start accepts. Automaton has 12716 states and 19569 transitions. Word has length 87 [2020-10-29 13:52:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:52:25,490 INFO L481 AbstractCegarLoop]: Abstraction has 12716 states and 19569 transitions. [2020-10-29 13:52:25,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:52:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 12716 states and 19569 transitions. [2020-10-29 13:52:25,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 13:52:25,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:52:25,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:52:25,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:52:25,495 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:52:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:52:25,496 INFO L82 PathProgramCache]: Analyzing trace with hash 126062546, now seen corresponding path program 1 times [2020-10-29 13:52:25,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:52:25,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363332788] [2020-10-29 13:52:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:52:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:25,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:25,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:25,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:28,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:28,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 13:52:28,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:52:28,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3010 [2020-10-29 13:52:28,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:28,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:28,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:52:28,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:52:28,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 13:52:28,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:52:28,987 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:52:28,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:52:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:28,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:29,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:29,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:52:29,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:52:29,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:52:29,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:29,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:29,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:52:29,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:52:29,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:52:29,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:52:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:52:29,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363332788] [2020-10-29 13:52:29,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:52:29,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:52:29,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162346303] [2020-10-29 13:52:29,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:52:29,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:52:29,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:52:29,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:52:29,038 INFO L87 Difference]: Start difference. First operand 12716 states and 19569 transitions. Second operand 9 states. [2020-10-29 13:52:29,388 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:52:31,993 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:52:32,388 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:52:39,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:52:39,140 INFO L93 Difference]: Finished difference Result 68454 states and 105338 transitions. [2020-10-29 13:52:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:52:39,140 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 87 [2020-10-29 13:52:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:52:39,291 INFO L225 Difference]: With dead ends: 68454 [2020-10-29 13:52:39,291 INFO L226 Difference]: Without dead ends: 60831 [2020-10-29 13:52:39,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2020-10-29 13:52:39,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60831 states. [2020-10-29 13:52:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60831 to 12988. [2020-10-29 13:52:41,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12988 states. [2020-10-29 13:52:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12988 states to 12988 states and 19935 transitions. [2020-10-29 13:52:41,452 INFO L78 Accepts]: Start accepts. Automaton has 12988 states and 19935 transitions. Word has length 87 [2020-10-29 13:52:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:52:41,452 INFO L481 AbstractCegarLoop]: Abstraction has 12988 states and 19935 transitions. [2020-10-29 13:52:41,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:52:41,453 INFO L276 IsEmpty]: Start isEmpty. Operand 12988 states and 19935 transitions. [2020-10-29 13:52:41,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 13:52:41,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:52:41,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:52:41,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:52:41,467 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:52:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:52:41,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1502227598, now seen corresponding path program 1 times [2020-10-29 13:52:41,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:52:41,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988110167] [2020-10-29 13:52:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:52:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:41,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:41,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:41,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:44,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:44,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 13:52:44,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:52:44,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2542 [2020-10-29 13:52:44,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:44,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:44,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:52:44,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:52:44,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-29 13:52:44,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:52:44,527 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:52:44,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:52:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:44,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:44,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:44,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:52:44,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:52:44,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:52:44,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:44,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:44,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:52:44,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:52:44,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:52:44,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:52:44,573 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 13:52:44,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988110167] [2020-10-29 13:52:44,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:52:44,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:52:44,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011453696] [2020-10-29 13:52:44,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:52:44,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:52:44,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:52:44,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:52:44,575 INFO L87 Difference]: Start difference. First operand 12988 states and 19935 transitions. Second operand 9 states. [2020-10-29 13:52:44,957 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:52:48,201 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:52:48,593 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:52:57,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:52:57,349 INFO L93 Difference]: Finished difference Result 75111 states and 115395 transitions. [2020-10-29 13:52:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:52:57,349 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 87 [2020-10-29 13:52:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:52:57,457 INFO L225 Difference]: With dead ends: 75111 [2020-10-29 13:52:57,458 INFO L226 Difference]: Without dead ends: 65164 [2020-10-29 13:52:57,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2020-10-29 13:52:57,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65164 states. [2020-10-29 13:52:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65164 to 13298. [2020-10-29 13:52:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13298 states. [2020-10-29 13:52:59,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13298 states to 13298 states and 20338 transitions. [2020-10-29 13:52:59,870 INFO L78 Accepts]: Start accepts. Automaton has 13298 states and 20338 transitions. Word has length 87 [2020-10-29 13:52:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:52:59,870 INFO L481 AbstractCegarLoop]: Abstraction has 13298 states and 20338 transitions. [2020-10-29 13:52:59,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:52:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 13298 states and 20338 transitions. [2020-10-29 13:53:00,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 13:53:00,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:53:00,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:53:00,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:53:00,027 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:53:00,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:53:00,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1206572127, now seen corresponding path program 1 times [2020-10-29 13:53:00,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:53:00,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128837344] [2020-10-29 13:53:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:53:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:53:00,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:00,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:00,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:53:00,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 13:53:00,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:53:00,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 528 [2020-10-29 13:53:00,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:53:00,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:53:00,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:53:00,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:53:00,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:53:00,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:53:00,954 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:53:00,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:53:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:53:00,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:01,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:53:01,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:53:01,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:53:01,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-29 13:53:01,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:53:01,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:53:01,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:53:01,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:53:01,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:53:01,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:53:01,047 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 13:53:01,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128837344] [2020-10-29 13:53:01,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:53:01,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:53:01,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889613833] [2020-10-29 13:53:01,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:53:01,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:53:01,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:53:01,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:53:01,053 INFO L87 Difference]: Start difference. First operand 13298 states and 20338 transitions. Second operand 6 states. [2020-10-29 13:53:01,432 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:53:03,121 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:53:06,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:53:06,383 INFO L93 Difference]: Finished difference Result 37007 states and 56707 transitions. [2020-10-29 13:53:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:53:06,384 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-29 13:53:06,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:53:06,415 INFO L225 Difference]: With dead ends: 37007 [2020-10-29 13:53:06,416 INFO L226 Difference]: Without dead ends: 23776 [2020-10-29 13:53:06,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:53:06,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23776 states. [2020-10-29 13:53:09,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23776 to 23773. [2020-10-29 13:53:09,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23773 states. [2020-10-29 13:53:09,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23773 states to 23773 states and 36281 transitions. [2020-10-29 13:53:09,959 INFO L78 Accepts]: Start accepts. Automaton has 23773 states and 36281 transitions. Word has length 87 [2020-10-29 13:53:09,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:53:09,959 INFO L481 AbstractCegarLoop]: Abstraction has 23773 states and 36281 transitions. [2020-10-29 13:53:09,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:53:09,959 INFO L276 IsEmpty]: Start isEmpty. Operand 23773 states and 36281 transitions. [2020-10-29 13:53:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-29 13:53:09,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:53:09,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:53:09,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:53:09,972 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:53:09,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:53:09,972 INFO L82 PathProgramCache]: Analyzing trace with hash -176797529, now seen corresponding path program 1 times [2020-10-29 13:53:09,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:53:09,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260491822] [2020-10-29 13:53:09,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:53:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:53:10,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:10,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:53:10,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-29 13:53:10,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:53:10,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-29 13:53:10,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:53:10,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:53:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:53:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-29 13:53:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:53:10,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:53:10,536 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:53:10,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:53:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:53:10,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:10,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:53:10,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:53:10,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:53:10,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:53:10,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:53:10,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:53:10,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:53:10,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:53:10,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:53:10,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:53:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:53:10,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260491822] [2020-10-29 13:53:10,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:53:10,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:53:10,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076067261] [2020-10-29 13:53:10,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:53:10,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:53:10,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:53:10,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:53:10,590 INFO L87 Difference]: Start difference. First operand 23773 states and 36281 transitions. Second operand 5 states. [2020-10-29 13:53:18,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:53:18,614 INFO L93 Difference]: Finished difference Result 45872 states and 70011 transitions. [2020-10-29 13:53:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:53:18,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-10-29 13:53:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:53:18,670 INFO L225 Difference]: With dead ends: 45872 [2020-10-29 13:53:18,670 INFO L226 Difference]: Without dead ends: 45869 [2020-10-29 13:53:18,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:53:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45869 states. [2020-10-29 13:53:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45869 to 24349. [2020-10-29 13:53:22,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24349 states. [2020-10-29 13:53:22,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24349 states to 24349 states and 36857 transitions. [2020-10-29 13:53:22,928 INFO L78 Accepts]: Start accepts. Automaton has 24349 states and 36857 transitions. Word has length 88 [2020-10-29 13:53:22,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:53:22,928 INFO L481 AbstractCegarLoop]: Abstraction has 24349 states and 36857 transitions. [2020-10-29 13:53:22,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:53:22,928 INFO L276 IsEmpty]: Start isEmpty. Operand 24349 states and 36857 transitions. [2020-10-29 13:53:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-29 13:53:22,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:53:22,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:53:22,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:53:22,940 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:53:22,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:53:22,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1705601063, now seen corresponding path program 1 times [2020-10-29 13:53:22,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:53:22,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381668170] [2020-10-29 13:53:22,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:53:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:53:22,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:23,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:53:23,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-29 13:53:23,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:53:23,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-29 13:53:23,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:53:23,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:53:23,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:53:23,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:53:23,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-29 13:53:23,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:53:23,491 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:53:23,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:53:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:53:23,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:23,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:53:23,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:53:23,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:53:23,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:53:23,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:53:23,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:53:23,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:53:23,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:53:23,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:53:23,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:53:23,541 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 13:53:23,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381668170] [2020-10-29 13:53:23,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:53:23,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:53:23,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436825282] [2020-10-29 13:53:23,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:53:23,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:53:23,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:53:23,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:53:23,546 INFO L87 Difference]: Start difference. First operand 24349 states and 36857 transitions. Second operand 5 states. [2020-10-29 13:53:23,920 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:53:25,615 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:53:32,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:53:32,232 INFO L93 Difference]: Finished difference Result 66531 states and 100861 transitions. [2020-10-29 13:53:32,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:53:32,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-10-29 13:53:32,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:53:32,298 INFO L225 Difference]: With dead ends: 66531 [2020-10-29 13:53:32,298 INFO L226 Difference]: Without dead ends: 44432 [2020-10-29 13:53:32,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:53:32,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44432 states. [2020-10-29 13:53:39,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44432 to 44141. [2020-10-29 13:53:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44141 states. [2020-10-29 13:53:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44141 states to 44141 states and 66265 transitions. [2020-10-29 13:53:39,334 INFO L78 Accepts]: Start accepts. Automaton has 44141 states and 66265 transitions. Word has length 89 [2020-10-29 13:53:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:53:39,334 INFO L481 AbstractCegarLoop]: Abstraction has 44141 states and 66265 transitions. [2020-10-29 13:53:39,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:53:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 44141 states and 66265 transitions. [2020-10-29 13:53:39,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-29 13:53:39,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:53:39,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:53:39,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:53:39,343 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:53:39,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:53:39,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1850484902, now seen corresponding path program 1 times [2020-10-29 13:53:39,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:53:39,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428795472] [2020-10-29 13:53:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:53:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:53:39,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:39,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:39,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:42,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:53:42,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-29 13:53:42,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:53:42,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2888 [2020-10-29 13:53:42,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:53:42,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:53:42,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:53:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:53:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 13:53:42,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:53:42,643 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:53:42,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:53:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:53:42,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:42,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:53:42,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:53:42,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:53:42,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:53:42,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:53:42,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:53:42,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:53:42,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:53:42,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:53:42,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:53:42,688 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 13:53:42,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428795472] [2020-10-29 13:53:42,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:53:42,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:53:42,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390512570] [2020-10-29 13:53:42,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:53:42,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:53:42,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:53:42,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:53:42,691 INFO L87 Difference]: Start difference. First operand 44141 states and 66265 transitions. Second operand 8 states. [2020-10-29 13:53:43,108 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:53:45,318 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:53:45,675 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:53:46,060 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:54:03,315 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:54:03,723 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:54:04,134 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:54:04,644 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:54:11,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:54:11,098 INFO L93 Difference]: Finished difference Result 167384 states and 253826 transitions. [2020-10-29 13:54:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 13:54:11,099 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2020-10-29 13:54:11,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:54:11,518 INFO L225 Difference]: With dead ends: 167384 [2020-10-29 13:54:11,518 INFO L226 Difference]: Without dead ends: 146293 [2020-10-29 13:54:11,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-29 13:54:11,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146293 states. [2020-10-29 13:54:24,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146293 to 69149. [2020-10-29 13:54:24,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69149 states. [2020-10-29 13:54:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69149 states to 69149 states and 104025 transitions. [2020-10-29 13:54:24,251 INFO L78 Accepts]: Start accepts. Automaton has 69149 states and 104025 transitions. Word has length 89 [2020-10-29 13:54:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:54:24,252 INFO L481 AbstractCegarLoop]: Abstraction has 69149 states and 104025 transitions. [2020-10-29 13:54:24,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:54:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 69149 states and 104025 transitions. [2020-10-29 13:54:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-29 13:54:24,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:54:24,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:54:24,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:54:24,261 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:54:24,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:54:24,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1172805747, now seen corresponding path program 1 times [2020-10-29 13:54:24,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:54:24,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235712570] [2020-10-29 13:54:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:54:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:24,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:24,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:24,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:27,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:27,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-29 13:54:27,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:54:27,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2732 [2020-10-29 13:54:27,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:27,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:27,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:54:27,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:54:27,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 13:54:27,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:54:27,395 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:54:27,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:54:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:27,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:27,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:27,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:54:27,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:54:27,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:54:27,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:27,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:27,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:54:27,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:54:27,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:54:27,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:54:27,432 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 13:54:27,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235712570] [2020-10-29 13:54:27,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:54:27,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:54:27,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570719209] [2020-10-29 13:54:27,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:54:27,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:54:27,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:54:27,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:54:27,434 INFO L87 Difference]: Start difference. First operand 69149 states and 104025 transitions. Second operand 8 states. [2020-10-29 13:54:27,841 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:54:29,983 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:54:30,307 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:54:31,057 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:54:49,008 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:54:49,414 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:54:49,895 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:54:50,250 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:54:57,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:54:57,717 INFO L93 Difference]: Finished difference Result 179688 states and 271258 transitions. [2020-10-29 13:54:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 13:54:57,717 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2020-10-29 13:54:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:54:58,393 INFO L225 Difference]: With dead ends: 179688 [2020-10-29 13:54:58,393 INFO L226 Difference]: Without dead ends: 147541 [2020-10-29 13:54:58,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-29 13:54:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147541 states.