/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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:49:27,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:49:27,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:49:27,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:49:27,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:49:27,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:49:27,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:49:27,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:49:27,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:49:27,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:49:27,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:49:27,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:49:27,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:49:27,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:49:27,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:49:27,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:49:27,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:49:27,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:49:27,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:49:27,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:49:27,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:49:27,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:49:27,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:49:27,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:49:27,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:49:27,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:49:27,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:49:27,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:49:27,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:49:27,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:49:27,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:49:27,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:49:27,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:49:27,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:49:27,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:49:27,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:49:27,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:49:27,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:49:27,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:49:27,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:49:27,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:49:27,269 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 13:49:27,323 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:49:27,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:49:27,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:49:27,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:49:27,326 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:49:27,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:49:27,326 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:49:27,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:49:27,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:49:27,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:49:27,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:49:27,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:49:27,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:49:27,327 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:49:27,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:49:27,328 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:49:27,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:49:27,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:49:27,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:49:27,330 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:49:27,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:49:27,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:49:27,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:49:27,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:49:27,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:49:27,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:49:27,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:49:27,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:49:27,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:49:27,332 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:49:27,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:49:27,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:49:27,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:49:27,789 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:49:27,789 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:49:27,791 INFO L432 ainManager$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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:49:27,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94bcf4634/dd1b8462054843968d7c9f5f9c6066cb/FLAGa06ebd6ad [2020-10-29 13:49:28,583 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:49:28,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:49:28,597 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94bcf4634/dd1b8462054843968d7c9f5f9c6066cb/FLAGa06ebd6ad [2020-10-29 13:49:28,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94bcf4634/dd1b8462054843968d7c9f5f9c6066cb [2020-10-29 13:49:28,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:49:28,893 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:49:28,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:49:28,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:49:28,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:49:28,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:49:28" (1/1) ... [2020-10-29 13:49:28,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66de8fb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:28, skipping insertion in model container [2020-10-29 13:49:28,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:49:28" (1/1) ... [2020-10-29 13:49:28,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:49:28,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:49:29,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:49:29,290 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:49:29,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:49:29,496 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:49:29,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:29 WrapperNode [2020-10-29 13:49:29,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:49:29,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:49:29,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:49:29,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:49:29,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:29" (1/1) ... [2020-10-29 13:49:29,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:29" (1/1) ... [2020-10-29 13:49:29,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:29" (1/1) ... [2020-10-29 13:49:29,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:29" (1/1) ... [2020-10-29 13:49:29,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:29" (1/1) ... [2020-10-29 13:49:29,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:29" (1/1) ... [2020-10-29 13:49:29,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:29" (1/1) ... [2020-10-29 13:49:29,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:49:29,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:49:29,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:49:29,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:49:29,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:29" (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 13:49:29,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:49:29,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:49:29,714 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:49:29,715 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:49:29,715 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:49:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:49:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:49:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:49:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:49:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:49:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:49:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:49:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:49:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:49:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:49:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:49:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:49:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:49:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:49:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:49:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:49:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:49:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:49:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:49:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:49:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:49:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:49:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:49:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:49:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:49:30,634 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:49:30,635 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:49:30,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:49:30 BoogieIcfgContainer [2020-10-29 13:49:30,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:49:30,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:49:30,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:49:30,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:49:30,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:49:28" (1/3) ... [2020-10-29 13:49:30,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31398e3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:49:30, skipping insertion in model container [2020-10-29 13:49:30,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:29" (2/3) ... [2020-10-29 13:49:30,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31398e3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:49:30, skipping insertion in model container [2020-10-29 13:49:30,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:49:30" (3/3) ... [2020-10-29 13:49:30,649 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:49:30,660 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:49:30,665 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:49:30,679 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:49:30,708 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:49:30,708 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:49:30,709 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:49:30,709 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:49:30,709 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:49:30,709 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:49:30,709 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:49:30,709 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:49:30,731 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states. [2020-10-29 13:49:30,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:49:30,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:49:30,744 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] [2020-10-29 13:49:30,744 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:49:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:49:30,751 INFO L82 PathProgramCache]: Analyzing trace with hash -144079420, now seen corresponding path program 1 times [2020-10-29 13:49:30,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:49:30,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729323072] [2020-10-29 13:49:30,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:49:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:31,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:31,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:31,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:31,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:32,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:36,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:36,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:49:36,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:49:36,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:49:36,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:36,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:36,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:49:36,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:49:36,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:49:36,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:49:36,633 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:49:36,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:49:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:36,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:36,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:36,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:49:36,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:49:36,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 13:49:36,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:36,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:36,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:49:36,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:49:36,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:49:36,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:49:36,732 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 13:49:36,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729323072] [2020-10-29 13:49:36,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:49:36,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:49:36,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316266515] [2020-10-29 13:49:36,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:49:36,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:49:36,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:49:36,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:49:36,768 INFO L87 Difference]: Start difference. First operand 147 states. Second operand 8 states. [2020-10-29 13:49:37,292 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:49:38,766 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:49:39,188 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:49:39,522 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:49:39,848 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:49:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:49:39,951 INFO L93 Difference]: Finished difference Result 777 states and 1229 transitions. [2020-10-29 13:49:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:49:39,953 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-29 13:49:39,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:49:39,974 INFO L225 Difference]: With dead ends: 777 [2020-10-29 13:49:39,974 INFO L226 Difference]: Without dead ends: 645 [2020-10-29 13:49:39,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:49:40,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2020-10-29 13:49:40,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 238. [2020-10-29 13:49:40,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-29 13:49:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 355 transitions. [2020-10-29 13:49:40,071 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 355 transitions. Word has length 66 [2020-10-29 13:49:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:49:40,072 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 355 transitions. [2020-10-29 13:49:40,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:49:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 355 transitions. [2020-10-29 13:49:40,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:49:40,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:49:40,077 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] [2020-10-29 13:49:40,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:49:40,077 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:49:40,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:49:40,078 INFO L82 PathProgramCache]: Analyzing trace with hash -746312999, now seen corresponding path program 1 times [2020-10-29 13:49:40,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:49:40,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222474175] [2020-10-29 13:49:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:49:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:40,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:40,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:40,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:40,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:40,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:42,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:42,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:49:42,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:49:42,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2330 [2020-10-29 13:49:42,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:42,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:42,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:49:42,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 13:49:42,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:49:42,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:49:42,783 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:49:42,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:49:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:42,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:42,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:42,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:49:42,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:49:42,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:49:42,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:42,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:42,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:49:42,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:49:42,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:49:42,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:49:42,830 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 13:49:42,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222474175] [2020-10-29 13:49:42,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:49:42,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:49:42,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553710675] [2020-10-29 13:49:42,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:49:42,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:49:42,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:49:42,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:49:42,834 INFO L87 Difference]: Start difference. First operand 238 states and 355 transitions. Second operand 4 states. [2020-10-29 13:49:43,148 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:49:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:49:44,027 INFO L93 Difference]: Finished difference Result 604 states and 935 transitions. [2020-10-29 13:49:44,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:49:44,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-29 13:49:44,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:49:44,033 INFO L225 Difference]: With dead ends: 604 [2020-10-29 13:49:44,034 INFO L226 Difference]: Without dead ends: 405 [2020-10-29 13:49:44,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:49:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-10-29 13:49:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 402. [2020-10-29 13:49:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-29 13:49:44,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 615 transitions. [2020-10-29 13:49:44,078 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 615 transitions. Word has length 67 [2020-10-29 13:49:44,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:49:44,078 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 615 transitions. [2020-10-29 13:49:44,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:49:44,078 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 615 transitions. [2020-10-29 13:49:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:49:44,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:49:44,081 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] [2020-10-29 13:49:44,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:49:44,081 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:49:44,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:49:44,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2105860225, now seen corresponding path program 1 times [2020-10-29 13:49:44,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:49:44,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613560675] [2020-10-29 13:49:44,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:49:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:44,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:44,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:44,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:44,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:45,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:45,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:49:45,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:49:45,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1069 [2020-10-29 13:49:45,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:45,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:45,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:49:45,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 13:49:45,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 13:49:45,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:49:45,506 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:49:45,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:49:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:45,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:45,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:45,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:49:45,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:49:45,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:49:45,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:45,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:49:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:49:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:49:45,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:49:45,560 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 13:49:45,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613560675] [2020-10-29 13:49:45,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:49:45,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:49:45,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921724652] [2020-10-29 13:49:45,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:49:45,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:49:45,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:49:45,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:49:45,565 INFO L87 Difference]: Start difference. First operand 402 states and 615 transitions. Second operand 4 states. [2020-10-29 13:49:45,891 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:49:46,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:49:46,702 INFO L93 Difference]: Finished difference Result 1064 states and 1663 transitions. [2020-10-29 13:49:46,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:49:46,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-29 13:49:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:49:46,708 INFO L225 Difference]: With dead ends: 1064 [2020-10-29 13:49:46,708 INFO L226 Difference]: Without dead ends: 701 [2020-10-29 13:49:46,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:49:46,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2020-10-29 13:49:46,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 698. [2020-10-29 13:49:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2020-10-29 13:49:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1081 transitions. [2020-10-29 13:49:46,788 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1081 transitions. Word has length 68 [2020-10-29 13:49:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:49:46,790 INFO L481 AbstractCegarLoop]: Abstraction has 698 states and 1081 transitions. [2020-10-29 13:49:46,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:49:46,794 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1081 transitions. [2020-10-29 13:49:46,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:49:46,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:49:46,803 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] [2020-10-29 13:49:46,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:49:46,803 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:49:46,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:49:46,805 INFO L82 PathProgramCache]: Analyzing trace with hash -774378536, now seen corresponding path program 1 times [2020-10-29 13:49:46,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:49:46,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269204918] [2020-10-29 13:49:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:49:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:46,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:46,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:47,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:47,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:47,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:49:47,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:49:47,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-29 13:49:47,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:47,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:47,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:49:47,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 13:49:47,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:49:47,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:49:47,698 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:49:47,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:49:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:47,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:47,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:47,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:49:47,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:49:47,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:49:47,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:47,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:47,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:49:47,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:49:47,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:49:47,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:49:47,757 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 13:49:47,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269204918] [2020-10-29 13:49:47,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:49:47,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:49:47,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120205156] [2020-10-29 13:49:47,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:49:47,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:49:47,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:49:47,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:49:47,762 INFO L87 Difference]: Start difference. First operand 698 states and 1081 transitions. Second operand 4 states. [2020-10-29 13:49:48,062 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:49:48,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:49:48,942 INFO L93 Difference]: Finished difference Result 1888 states and 2957 transitions. [2020-10-29 13:49:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:49:48,943 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-29 13:49:48,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:49:48,954 INFO L225 Difference]: With dead ends: 1888 [2020-10-29 13:49:48,954 INFO L226 Difference]: Without dead ends: 1229 [2020-10-29 13:49:48,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:49:48,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2020-10-29 13:49:49,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1226. [2020-10-29 13:49:49,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2020-10-29 13:49:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1905 transitions. [2020-10-29 13:49:49,057 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1905 transitions. Word has length 69 [2020-10-29 13:49:49,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:49:49,058 INFO L481 AbstractCegarLoop]: Abstraction has 1226 states and 1905 transitions. [2020-10-29 13:49:49,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:49:49,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1905 transitions. [2020-10-29 13:49:49,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:49:49,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:49:49,059 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] [2020-10-29 13:49:49,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:49:49,060 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:49:49,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:49:49,061 INFO L82 PathProgramCache]: Analyzing trace with hash 664470761, now seen corresponding path program 1 times [2020-10-29 13:49:49,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:49:49,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677758230] [2020-10-29 13:49:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:49:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:49,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:49,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:49,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:49,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:49:49,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:49:49,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-29 13:49:49,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:49,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:49,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:49:49,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-29 13:49:49,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:49:49,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:49:49,694 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:49:49,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:49:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:49,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:49,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:49,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:49:49,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:49:49,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 13:49:49,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:49,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:49,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:49:49,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:49:49,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:49:49,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:49:49,747 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 13:49:49,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677758230] [2020-10-29 13:49:49,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:49:49,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:49:49,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881365929] [2020-10-29 13:49:49,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:49:49,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:49:49,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:49:49,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:49:49,750 INFO L87 Difference]: Start difference. First operand 1226 states and 1905 transitions. Second operand 4 states. [2020-10-29 13:49:50,048 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:49:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:49:50,912 INFO L93 Difference]: Finished difference Result 3344 states and 5221 transitions. [2020-10-29 13:49:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:49:50,913 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-29 13:49:50,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:49:50,925 INFO L225 Difference]: With dead ends: 3344 [2020-10-29 13:49:50,926 INFO L226 Difference]: Without dead ends: 2157 [2020-10-29 13:49:50,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:49:50,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2020-10-29 13:49:51,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 2154. [2020-10-29 13:49:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2154 states. [2020-10-29 13:49:51,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 3337 transitions. [2020-10-29 13:49:51,093 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 3337 transitions. Word has length 70 [2020-10-29 13:49:51,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:49:51,094 INFO L481 AbstractCegarLoop]: Abstraction has 2154 states and 3337 transitions. [2020-10-29 13:49:51,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:49:51,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 3337 transitions. [2020-10-29 13:49:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:49:51,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:49:51,097 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] [2020-10-29 13:49:51,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:49:51,097 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:49:51,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:49:51,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1457190185, now seen corresponding path program 1 times [2020-10-29 13:49:51,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:49:51,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023196339] [2020-10-29 13:49:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:49:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:51,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:51,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:52,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:52,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:49:52,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:49:52,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 958 [2020-10-29 13:49:52,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:52,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:52,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:49:52,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:49:52,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:49:52,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:49:52,476 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:49:52,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:49:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:52,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:52,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:52,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:49:52,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:49:52,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:49:52,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:52,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:52,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:49:52,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:49:52,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:49:52,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:49:52,548 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 13:49:52,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023196339] [2020-10-29 13:49:52,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:49:52,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:49:52,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274578653] [2020-10-29 13:49:52,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:49:52,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:49:52,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:49:52,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:49:52,554 INFO L87 Difference]: Start difference. First operand 2154 states and 3337 transitions. Second operand 8 states. [2020-10-29 13:49:53,610 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:49:53,898 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:49:54,199 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:49:54,507 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:49:54,841 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:49:56,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:49:56,207 INFO L93 Difference]: Finished difference Result 11289 states and 17459 transitions. [2020-10-29 13:49:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:49:56,207 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-29 13:49:56,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:49:56,259 INFO L225 Difference]: With dead ends: 11289 [2020-10-29 13:49:56,259 INFO L226 Difference]: Without dead ends: 9174 [2020-10-29 13:49:56,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:49:56,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9174 states. [2020-10-29 13:49:56,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9174 to 9162. [2020-10-29 13:49:56,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9162 states. [2020-10-29 13:49:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9162 states to 9162 states and 14121 transitions. [2020-10-29 13:49:56,954 INFO L78 Accepts]: Start accepts. Automaton has 9162 states and 14121 transitions. Word has length 71 [2020-10-29 13:49:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:49:56,955 INFO L481 AbstractCegarLoop]: Abstraction has 9162 states and 14121 transitions. [2020-10-29 13:49:56,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:49:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 9162 states and 14121 transitions. [2020-10-29 13:49:56,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:49:56,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:49:56,956 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] [2020-10-29 13:49:56,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:49:56,957 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:49:56,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:49:56,957 INFO L82 PathProgramCache]: Analyzing trace with hash -588936793, now seen corresponding path program 1 times [2020-10-29 13:49:56,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:49:56,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105604378] [2020-10-29 13:49:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:49:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:56,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:57,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:57,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:57,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:49:57,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:49:57,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-29 13:49:57,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:57,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:57,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:49:57,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 13:49:57,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:49:57,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:49:57,664 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:49:57,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:49:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:57,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:57,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:57,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:49:57,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:49:57,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:49:57,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:57,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:57,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:49:57,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:49:57,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:49:57,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:49:57,708 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 13:49:57,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105604378] [2020-10-29 13:49:57,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:49:57,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:49:57,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286815797] [2020-10-29 13:49:57,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:49:57,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:49:57,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:49:57,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:49:57,711 INFO L87 Difference]: Start difference. First operand 9162 states and 14121 transitions. Second operand 4 states. [2020-10-29 13:49:57,997 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:49:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:49:59,518 INFO L93 Difference]: Finished difference Result 24688 states and 37901 transitions. [2020-10-29 13:49:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:49:59,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-29 13:49:59,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:49:59,591 INFO L225 Difference]: With dead ends: 24688 [2020-10-29 13:49:59,591 INFO L226 Difference]: Without dead ends: 15565 [2020-10-29 13:49:59,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:49:59,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15565 states. [2020-10-29 13:50:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15565 to 15562. [2020-10-29 13:50:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15562 states. [2020-10-29 13:50:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15562 states to 15562 states and 23657 transitions. [2020-10-29 13:50:00,685 INFO L78 Accepts]: Start accepts. Automaton has 15562 states and 23657 transitions. Word has length 72 [2020-10-29 13:50:00,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:50:00,686 INFO L481 AbstractCegarLoop]: Abstraction has 15562 states and 23657 transitions. [2020-10-29 13:50:00,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:50:00,687 INFO L276 IsEmpty]: Start isEmpty. Operand 15562 states and 23657 transitions. [2020-10-29 13:50:00,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:50:00,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:00,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:50:00,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:50:00,691 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:00,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:00,691 INFO L82 PathProgramCache]: Analyzing trace with hash -977595442, now seen corresponding path program 1 times [2020-10-29 13:50:00,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:00,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388865092] [2020-10-29 13:50:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:00,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:00,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:01,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:01,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:50:01,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:50:01,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-29 13:50:01,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:01,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:01,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:50:01,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:50:01,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:50:01,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:01,509 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:50:01,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:50:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:01,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:01,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:01,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:50:01,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:01,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:50:01,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:01,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:01,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:50:01,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:50:01,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:50:01,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:01,581 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 13:50:01,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388865092] [2020-10-29 13:50:01,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:50:01,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:50:01,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5964134] [2020-10-29 13:50:01,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:50:01,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:50:01,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:50:01,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:50:01,584 INFO L87 Difference]: Start difference. First operand 15562 states and 23657 transitions. Second operand 6 states. [2020-10-29 13:50:01,915 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:50:03,225 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:50:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:50:04,230 INFO L93 Difference]: Finished difference Result 46608 states and 70893 transitions. [2020-10-29 13:50:04,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:50:04,231 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 13:50:04,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:50:04,299 INFO L225 Difference]: With dead ends: 46608 [2020-10-29 13:50:04,299 INFO L226 Difference]: Without dead ends: 31085 [2020-10-29 13:50:04,329 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 13:50:04,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31085 states. [2020-10-29 13:50:06,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31085 to 31082. [2020-10-29 13:50:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31082 states. [2020-10-29 13:50:06,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31082 states to 31082 states and 46985 transitions. [2020-10-29 13:50:06,090 INFO L78 Accepts]: Start accepts. Automaton has 31082 states and 46985 transitions. Word has length 73 [2020-10-29 13:50:06,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:50:06,090 INFO L481 AbstractCegarLoop]: Abstraction has 31082 states and 46985 transitions. [2020-10-29 13:50:06,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:50:06,090 INFO L276 IsEmpty]: Start isEmpty. Operand 31082 states and 46985 transitions. [2020-10-29 13:50:06,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:50:06,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:06,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:50:06,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:50:06,092 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:06,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:06,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1333556343, now seen corresponding path program 1 times [2020-10-29 13:50:06,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:06,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910506748] [2020-10-29 13:50:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:06,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:06,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:06,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:50:06,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:06,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-29 13:50:06,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:06,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:06,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:50:06,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-29 13:50:06,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:50:06,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:06,769 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:50:06,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:50:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:06,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:06,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:06,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:50:06,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:06,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:50:06,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:06,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:06,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:50:06,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:50:06,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:50:06,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:06,811 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 13:50:06,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910506748] [2020-10-29 13:50:06,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:50:06,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:50:06,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742014011] [2020-10-29 13:50:06,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:50:06,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:50:06,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:50:06,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:50:06,814 INFO L87 Difference]: Start difference. First operand 31082 states and 46985 transitions. Second operand 5 states. [2020-10-29 13:50:10,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:50:10,599 INFO L93 Difference]: Finished difference Result 63405 states and 95211 transitions. [2020-10-29 13:50:10,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:50:10,600 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-29 13:50:10,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:50:10,753 INFO L225 Difference]: With dead ends: 63405 [2020-10-29 13:50:10,753 INFO L226 Difference]: Without dead ends: 63402 [2020-10-29 13:50:10,770 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 13:50:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63402 states. [2020-10-29 13:50:13,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63402 to 32362. [2020-10-29 13:50:13,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32362 states. [2020-10-29 13:50:13,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32362 states to 32362 states and 48265 transitions. [2020-10-29 13:50:13,569 INFO L78 Accepts]: Start accepts. Automaton has 32362 states and 48265 transitions. Word has length 73 [2020-10-29 13:50:13,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:50:13,570 INFO L481 AbstractCegarLoop]: Abstraction has 32362 states and 48265 transitions. [2020-10-29 13:50:13,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:50:13,570 INFO L276 IsEmpty]: Start isEmpty. Operand 32362 states and 48265 transitions. [2020-10-29 13:50:13,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:50:13,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:13,571 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] [2020-10-29 13:50:13,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:50:13,572 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:13,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:13,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1907335397, now seen corresponding path program 1 times [2020-10-29 13:50:13,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:13,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635053146] [2020-10-29 13:50:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:13,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:13,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:13,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:50:13,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:13,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-29 13:50:13,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:13,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:13,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:50:13,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:50:13,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:50:13,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:14,047 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:50:14,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:50:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:14,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:14,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:14,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:50:14,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:14,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:50:14,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:14,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:50:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:50:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:50:14,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:14,097 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 13:50:14,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635053146] [2020-10-29 13:50:14,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:50:14,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:50:14,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855178743] [2020-10-29 13:50:14,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:50:14,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:50:14,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:50:14,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:50:14,099 INFO L87 Difference]: Start difference. First operand 32362 states and 48265 transitions. Second operand 4 states. [2020-10-29 13:50:14,417 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:50:17,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:50:17,455 INFO L93 Difference]: Finished difference Result 72290 states and 107631 transitions. [2020-10-29 13:50:17,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:50:17,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-29 13:50:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:50:17,553 INFO L225 Difference]: With dead ends: 72290 [2020-10-29 13:50:17,553 INFO L226 Difference]: Without dead ends: 39967 [2020-10-29 13:50:17,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:50:17,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39967 states. [2020-10-29 13:50:20,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39967 to 39820. [2020-10-29 13:50:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39820 states. [2020-10-29 13:50:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39820 states to 39820 states and 58971 transitions. [2020-10-29 13:50:20,515 INFO L78 Accepts]: Start accepts. Automaton has 39820 states and 58971 transitions. Word has length 74 [2020-10-29 13:50:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:50:20,515 INFO L481 AbstractCegarLoop]: Abstraction has 39820 states and 58971 transitions. [2020-10-29 13:50:20,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:50:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 39820 states and 58971 transitions. [2020-10-29 13:50:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-29 13:50:20,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:20,535 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:50:20,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:50:20,536 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:20,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:20,536 INFO L82 PathProgramCache]: Analyzing trace with hash 861599860, now seen corresponding path program 1 times [2020-10-29 13:50:20,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:20,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442138230] [2020-10-29 13:50:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:20,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:20,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:20,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:20,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:21,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:21,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:25,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:25,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 13:50:25,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:50:25,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:50:25,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:25,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:25,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:50:25,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:50:25,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-29 13:50:25,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:26,054 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:50:26,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:50:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:26,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:26,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:26,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:50:26,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:26,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:50:26,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:26,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:26,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:50:26,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:50:26,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:50:26,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:50:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:50:26,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442138230] [2020-10-29 13:50:26,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:50:26,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:50:26,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587670791] [2020-10-29 13:50:26,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:50:26,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:50:26,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:50:26,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:50:26,180 INFO L87 Difference]: Start difference. First operand 39820 states and 58971 transitions. Second operand 8 states. [2020-10-29 13:50:28,647 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:50:28,970 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:50:29,289 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:50:29,598 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:50:29,897 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:50:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:50:33,364 INFO L93 Difference]: Finished difference Result 102684 states and 152231 transitions. [2020-10-29 13:50:33,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:50:33,365 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 101 [2020-10-29 13:50:33,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:50:33,462 INFO L225 Difference]: With dead ends: 102684 [2020-10-29 13:50:33,463 INFO L226 Difference]: Without dead ends: 69273 [2020-10-29 13:50:33,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:50:33,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69273 states. [2020-10-29 13:50:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69273 to 69261. [2020-10-29 13:50:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69261 states. [2020-10-29 13:50:38,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69261 states to 69261 states and 101869 transitions. [2020-10-29 13:50:38,377 INFO L78 Accepts]: Start accepts. Automaton has 69261 states and 101869 transitions. Word has length 101 [2020-10-29 13:50:38,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:50:38,378 INFO L481 AbstractCegarLoop]: Abstraction has 69261 states and 101869 transitions. [2020-10-29 13:50:38,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:50:38,378 INFO L276 IsEmpty]: Start isEmpty. Operand 69261 states and 101869 transitions. [2020-10-29 13:50:38,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-29 13:50:38,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:38,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:50:38,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:50:38,410 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:38,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2007509221, now seen corresponding path program 1 times [2020-10-29 13:50:38,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:38,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989281968] [2020-10-29 13:50:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:38,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:38,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:38,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:39,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:39,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 13:50:39,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:50:39,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1238 [2020-10-29 13:50:39,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:39,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:39,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:50:39,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:50:39,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-29 13:50:39,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:40,018 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:50:40,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:50:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:40,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:40,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:40,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:50:40,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:40,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:50:40,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:40,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:40,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:50:40,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:50:40,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:50:40,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:50:40,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989281968] [2020-10-29 13:50:40,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:50:40,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 13:50:40,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930751242] [2020-10-29 13:50:40,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:50:40,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:50:40,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:50:40,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:50:40,074 INFO L87 Difference]: Start difference. First operand 69261 states and 101869 transitions. Second operand 5 states. [2020-10-29 13:50:40,563 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:50:42,645 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:50:42,987 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:50:49,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:50:49,823 INFO L93 Difference]: Finished difference Result 177206 states and 261091 transitions. [2020-10-29 13:50:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:50:49,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 101 [2020-10-29 13:50:49,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:50:49,998 INFO L225 Difference]: With dead ends: 177206 [2020-10-29 13:50:49,998 INFO L226 Difference]: Without dead ends: 121075 [2020-10-29 13:50:50,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:50:50,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121075 states. [2020-10-29 13:50:58,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121075 to 120509. [2020-10-29 13:50:58,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120509 states. [2020-10-29 13:50:59,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120509 states to 120509 states and 175805 transitions. [2020-10-29 13:50:59,266 INFO L78 Accepts]: Start accepts. Automaton has 120509 states and 175805 transitions. Word has length 101 [2020-10-29 13:50:59,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:50:59,267 INFO L481 AbstractCegarLoop]: Abstraction has 120509 states and 175805 transitions. [2020-10-29 13:50:59,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:50:59,267 INFO L276 IsEmpty]: Start isEmpty. Operand 120509 states and 175805 transitions. [2020-10-29 13:50:59,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-29 13:50:59,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:59,330 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:50:59,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:50:59,330 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:59,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:59,331 INFO L82 PathProgramCache]: Analyzing trace with hash -637483701, now seen corresponding path program 1 times [2020-10-29 13:50:59,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:59,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819277268] [2020-10-29 13:50:59,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:59,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:59,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:59,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:59,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:59,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:00,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:04,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:04,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 13:51:04,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:51:04,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:51:04,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:04,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:04,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:51:04,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:51:04,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 13:51:04,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:04,695 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:51:04,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:04,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:04,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:04,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:04,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:04,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:51:04,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:04,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:04,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:51:04,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:04,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:51:04,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:51:04,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819277268] [2020-10-29 13:51:04,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:51:04,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:51:04,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650200096] [2020-10-29 13:51:04,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:51:04,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:04,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:51:04,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:51:04,756 INFO L87 Difference]: Start difference. First operand 120509 states and 175805 transitions. Second operand 6 states. [2020-10-29 13:51:05,052 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-29 13:51:09,555 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:51:10,128 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-29 13:51:51,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:51,092 INFO L93 Difference]: Finished difference Result 761485 states and 1102425 transitions. [2020-10-29 13:51:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:51:51,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2020-10-29 13:51:51,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:52,292 INFO L225 Difference]: With dead ends: 761485 [2020-10-29 13:51:52,293 INFO L226 Difference]: Without dead ends: 641018 [2020-10-29 13:51:52,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:51:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641018 states.