/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:51:19,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:51:19,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:51:19,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:51:19,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:51:19,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:51:19,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:51:19,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:51:19,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:51:19,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:51:19,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:51:19,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:51:19,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:51:19,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:51:19,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:51:19,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:51:19,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:51:19,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:51:19,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:51:19,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:51:19,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:51:19,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:51:19,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:51:19,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:51:19,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:51:19,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:51:19,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:51:19,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:51:19,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:51:19,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:51:19,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:51:19,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:51:19,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:51:19,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:51:19,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:51:19,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:51:19,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:51:19,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:51:19,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:51:19,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:51:19,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:51:19,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:51:19,386 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:51:19,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:51:19,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:51:19,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:51:19,392 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:51:19,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:51:19,392 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:51:19,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:51:19,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:51:19,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:51:19,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:51:19,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:51:19,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:51:19,395 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:51:19,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:51:19,396 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:51:19,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:51:19,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:51:19,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:51:19,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:51:19,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:51:19,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:51:19,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:51:19,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:51:19,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:51:19,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:51:19,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:51:19,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:51:19,399 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:51:19,399 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:51:19,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:51:19,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:51:19,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:51:19,894 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:51:19,895 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:51:19,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:51:19,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cda25d5b/4283bf608e08441a8e4438464dac9ff5/FLAGb91e0d6ca [2020-10-29 13:51:20,645 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:51:20,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:51:20,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cda25d5b/4283bf608e08441a8e4438464dac9ff5/FLAGb91e0d6ca [2020-10-29 13:51:20,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cda25d5b/4283bf608e08441a8e4438464dac9ff5 [2020-10-29 13:51:20,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:51:20,977 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:51:20,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:51:20,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:51:20,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:51:20,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:51:20" (1/1) ... [2020-10-29 13:51:20,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e11534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:20, skipping insertion in model container [2020-10-29 13:51:20,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:51:20" (1/1) ... [2020-10-29 13:51:20,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:51:21,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:51:21,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:51:21,352 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:51:21,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:51:21,456 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:51:21,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:21 WrapperNode [2020-10-29 13:51:21,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:51:21,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:51:21,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:51:21,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:51:21,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:21" (1/1) ... [2020-10-29 13:51:21,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:21" (1/1) ... [2020-10-29 13:51:21,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:21" (1/1) ... [2020-10-29 13:51:21,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:21" (1/1) ... [2020-10-29 13:51:21,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:21" (1/1) ... [2020-10-29 13:51:21,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:21" (1/1) ... [2020-10-29 13:51:21,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:21" (1/1) ... [2020-10-29 13:51:21,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:51:21,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:51:21,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:51:21,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:51:21,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:51:21,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:51:21,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:51:21,628 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:51:21,628 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:51:21,628 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:51:21,628 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:51:21,629 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:51:21,629 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:51:21,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:51:21,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:51:21,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:51:21,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:51:21,630 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:51:21,630 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:51:21,630 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:51:21,630 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:51:21,630 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:51:21,631 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:51:21,631 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:51:21,631 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:51:21,631 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:51:21,631 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:51:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:51:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:51:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:51:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:51:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:51:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:51:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:51:21,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:51:22,668 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:51:22,668 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:51:22,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:51:22 BoogieIcfgContainer [2020-10-29 13:51:22,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:51:22,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:51:22,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:51:22,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:51:22,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:51:20" (1/3) ... [2020-10-29 13:51:22,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c89ca28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:51:22, skipping insertion in model container [2020-10-29 13:51:22,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:51:21" (2/3) ... [2020-10-29 13:51:22,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c89ca28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:51:22, skipping insertion in model container [2020-10-29 13:51:22,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:51:22" (3/3) ... [2020-10-29 13:51:22,684 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:51:22,698 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:51:22,704 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:51:22,721 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:51:22,767 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:51:22,768 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:51:22,768 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:51:22,768 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:51:22,768 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:51:22,768 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:51:22,769 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:51:22,769 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:51:22,802 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states. [2020-10-29 13:51:22,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:51:22,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:22,818 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] [2020-10-29 13:51:22,819 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:22,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:22,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2068660907, now seen corresponding path program 1 times [2020-10-29 13:51:22,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:22,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424657012] [2020-10-29 13:51:22,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:23,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:23,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:23,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:23,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:24,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:28,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:28,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:51:28,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:51:28,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4889 [2020-10-29 13:51:28,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:28,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:51:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:51:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 13:51:28,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 13:51:28,566 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:51:28,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:28,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:28,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:28,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:28,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:28,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:51:28,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:28,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:28,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:51:28,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:28,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:51:28,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:51:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:51:28,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424657012] [2020-10-29 13:51:28,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:51:28,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:51:28,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303598052] [2020-10-29 13:51:28,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:51:28,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:28,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:51:28,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:51:28,696 INFO L87 Difference]: Start difference. First operand 142 states. Second operand 8 states. [2020-10-29 13:51:29,165 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:51:30,548 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:51:30,867 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:51:31,186 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:51:31,498 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:51:31,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:31,602 INFO L93 Difference]: Finished difference Result 742 states and 1173 transitions. [2020-10-29 13:51:31,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:51:31,604 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-29 13:51:31,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:31,624 INFO L225 Difference]: With dead ends: 742 [2020-10-29 13:51:31,624 INFO L226 Difference]: Without dead ends: 615 [2020-10-29 13:51:31,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:51:31,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2020-10-29 13:51:31,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 228. [2020-10-29 13:51:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-29 13:51:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 339 transitions. [2020-10-29 13:51:31,735 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 339 transitions. Word has length 65 [2020-10-29 13:51:31,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:51:31,736 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 339 transitions. [2020-10-29 13:51:31,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:51:31,736 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 339 transitions. [2020-10-29 13:51:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:51:31,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:31,741 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 13:51:31,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:51:31,741 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:31,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:31,742 INFO L82 PathProgramCache]: Analyzing trace with hash -278779282, now seen corresponding path program 1 times [2020-10-29 13:51:31,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:31,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036468607] [2020-10-29 13:51:31,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:31,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:31,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:31,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:32,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:32,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:34,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:34,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:51:34,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:51:34,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2360 [2020-10-29 13:51:34,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:34,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:34,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:51:34,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 13:51:34,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:51:34,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:51:34,520 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:51:34,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:34,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:34,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:34,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:34,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:34,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:51:34,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:34,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:34,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:51:34,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:34,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:51:34,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:51:34,581 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 13:51:34,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036468607] [2020-10-29 13:51:34,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:51:34,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:51:34,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043532304] [2020-10-29 13:51:34,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:51:34,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:34,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:51:34,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:51:34,598 INFO L87 Difference]: Start difference. First operand 228 states and 339 transitions. Second operand 4 states. [2020-10-29 13:51:34,948 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:51:35,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:35,854 INFO L93 Difference]: Finished difference Result 574 states and 887 transitions. [2020-10-29 13:51:35,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:51:35,857 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-29 13:51:35,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:35,860 INFO L225 Difference]: With dead ends: 574 [2020-10-29 13:51:35,861 INFO L226 Difference]: Without dead ends: 385 [2020-10-29 13:51:35,863 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 13:51:35,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-29 13:51:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 382. [2020-10-29 13:51:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-10-29 13:51:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 583 transitions. [2020-10-29 13:51:35,901 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 583 transitions. Word has length 66 [2020-10-29 13:51:35,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:51:35,902 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 583 transitions. [2020-10-29 13:51:35,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:51:35,902 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 583 transitions. [2020-10-29 13:51:35,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:51:35,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:35,906 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 13:51:35,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:51:35,906 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:35,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:35,907 INFO L82 PathProgramCache]: Analyzing trace with hash -497199216, now seen corresponding path program 1 times [2020-10-29 13:51:35,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:35,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190813553] [2020-10-29 13:51:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:35,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:35,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:36,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:36,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:37,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:37,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:51:37,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:51:37,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1145 [2020-10-29 13:51:37,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:37,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:37,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:51:37,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-29 13:51:37,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:51:37,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:51:37,353 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:51:37,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:37,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:37,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:37,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:37,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:37,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:51:37,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:37,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:51:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:51:37,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:51:37,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190813553] [2020-10-29 13:51:37,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:51:37,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:51:37,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075945342] [2020-10-29 13:51:37,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:51:37,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:37,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:51:37,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:51:37,400 INFO L87 Difference]: Start difference. First operand 382 states and 583 transitions. Second operand 4 states. [2020-10-29 13:51:37,708 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:51:38,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:38,391 INFO L93 Difference]: Finished difference Result 1004 states and 1567 transitions. [2020-10-29 13:51:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:51:38,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-29 13:51:38,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:38,399 INFO L225 Difference]: With dead ends: 1004 [2020-10-29 13:51:38,399 INFO L226 Difference]: Without dead ends: 661 [2020-10-29 13:51:38,404 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 13:51:38,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-10-29 13:51:38,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 658. [2020-10-29 13:51:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2020-10-29 13:51:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1017 transitions. [2020-10-29 13:51:38,478 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1017 transitions. Word has length 67 [2020-10-29 13:51:38,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:51:38,480 INFO L481 AbstractCegarLoop]: Abstraction has 658 states and 1017 transitions. [2020-10-29 13:51:38,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:51:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1017 transitions. [2020-10-29 13:51:38,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:51:38,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:38,493 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 13:51:38,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:51:38,494 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:38,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:38,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1185763862, now seen corresponding path program 1 times [2020-10-29 13:51:38,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:38,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772061064] [2020-10-29 13:51:38,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:38,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:38,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:38,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:39,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:39,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:51:39,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:51:39,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-10-29 13:51:39,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:39,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:39,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:51:39,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 13:51:39,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:51:39,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:51:39,467 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:51:39,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:39,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:39,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:39,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:39,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:39,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:51:39,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:39,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:39,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:51:39,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:39,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:51:39,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:51:39,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772061064] [2020-10-29 13:51:39,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:51:39,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:51:39,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164868681] [2020-10-29 13:51:39,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:51:39,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:39,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:51:39,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:51:39,510 INFO L87 Difference]: Start difference. First operand 658 states and 1017 transitions. Second operand 4 states. [2020-10-29 13:51:39,797 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:51:40,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:40,577 INFO L93 Difference]: Finished difference Result 1768 states and 2765 transitions. [2020-10-29 13:51:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:51:40,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-29 13:51:40,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:40,588 INFO L225 Difference]: With dead ends: 1768 [2020-10-29 13:51:40,588 INFO L226 Difference]: Without dead ends: 1149 [2020-10-29 13:51:40,590 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 13:51:40,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-10-29 13:51:40,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1146. [2020-10-29 13:51:40,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1146 states. [2020-10-29 13:51:40,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1777 transitions. [2020-10-29 13:51:40,676 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1777 transitions. Word has length 68 [2020-10-29 13:51:40,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:51:40,678 INFO L481 AbstractCegarLoop]: Abstraction has 1146 states and 1777 transitions. [2020-10-29 13:51:40,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:51:40,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1777 transitions. [2020-10-29 13:51:40,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:51:40,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:40,681 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 13:51:40,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:51:40,682 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:40,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:40,682 INFO L82 PathProgramCache]: Analyzing trace with hash 918690393, now seen corresponding path program 1 times [2020-10-29 13:51:40,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:40,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933568547] [2020-10-29 13:51:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:40,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:40,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:41,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:41,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:51:41,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:51:41,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-29 13:51:41,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:41,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:41,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:51:41,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 13:51:41,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:51:41,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:41,331 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:51:41,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:41,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:41,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:41,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:41,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:41,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:51:41,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:41,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:41,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:51:41,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:41,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:51:41,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:51:41,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933568547] [2020-10-29 13:51:41,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:51:41,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:51:41,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275691602] [2020-10-29 13:51:41,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:51:41,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:41,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:51:41,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:51:41,376 INFO L87 Difference]: Start difference. First operand 1146 states and 1777 transitions. Second operand 4 states. [2020-10-29 13:51:41,691 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:51:42,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:42,586 INFO L93 Difference]: Finished difference Result 3104 states and 4837 transitions. [2020-10-29 13:51:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:51:42,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-29 13:51:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:42,599 INFO L225 Difference]: With dead ends: 3104 [2020-10-29 13:51:42,599 INFO L226 Difference]: Without dead ends: 1997 [2020-10-29 13:51:42,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:51:42,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2020-10-29 13:51:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1994. [2020-10-29 13:51:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1994 states. [2020-10-29 13:51:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 3081 transitions. [2020-10-29 13:51:42,733 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 3081 transitions. Word has length 69 [2020-10-29 13:51:42,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:51:42,733 INFO L481 AbstractCegarLoop]: Abstraction has 1994 states and 3081 transitions. [2020-10-29 13:51:42,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:51:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 3081 transitions. [2020-10-29 13:51:42,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:51:42,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:42,735 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 13:51:42,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:51:42,735 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:42,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:42,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1064613524, now seen corresponding path program 1 times [2020-10-29 13:51:42,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:42,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882273443] [2020-10-29 13:51:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:42,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:42,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:43,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:43,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:51:43,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:51:43,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-10-29 13:51:43,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:43,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:43,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:51:43,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:51:43,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:51:43,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:43,881 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:51:43,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:43,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:43,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:43,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:43,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:43,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:51:43,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:43,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:43,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:51:43,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:43,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:51:43,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:51:43,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882273443] [2020-10-29 13:51:43,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:51:43,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:51:43,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716094887] [2020-10-29 13:51:43,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:51:43,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:43,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:51:43,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:51:43,957 INFO L87 Difference]: Start difference. First operand 1994 states and 3081 transitions. Second operand 8 states. [2020-10-29 13:51:44,977 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:51:45,304 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:51:45,613 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:51:45,918 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:51:46,226 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:51:47,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:47,639 INFO L93 Difference]: Finished difference Result 10489 states and 16179 transitions. [2020-10-29 13:51:47,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:51:47,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:51:47,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:47,689 INFO L225 Difference]: With dead ends: 10489 [2020-10-29 13:51:47,689 INFO L226 Difference]: Without dead ends: 8534 [2020-10-29 13:51:47,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:51:47,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8534 states. [2020-10-29 13:51:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8534 to 8522. [2020-10-29 13:51:48,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8522 states. [2020-10-29 13:51:48,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8522 states to 8522 states and 13097 transitions. [2020-10-29 13:51:48,421 INFO L78 Accepts]: Start accepts. Automaton has 8522 states and 13097 transitions. Word has length 70 [2020-10-29 13:51:48,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:51:48,422 INFO L481 AbstractCegarLoop]: Abstraction has 8522 states and 13097 transitions. [2020-10-29 13:51:48,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:51:48,422 INFO L276 IsEmpty]: Start isEmpty. Operand 8522 states and 13097 transitions. [2020-10-29 13:51:48,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:51:48,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:48,424 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 13:51:48,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:51:48,424 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:48,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:48,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1449804043, now seen corresponding path program 1 times [2020-10-29 13:51:48,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:48,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199481034] [2020-10-29 13:51:48,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:48,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:48,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:48,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:48,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:51:48,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:51:48,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-29 13:51:48,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:48,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:48,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:51:48,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:51:48,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:51:48,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:49,319 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:51:49,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:49,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:49,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:49,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:49,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:49,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 13:51:49,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:49,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:49,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:51:49,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:49,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:51:49,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:51:49,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199481034] [2020-10-29 13:51:49,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:51:49,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:51:49,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262637331] [2020-10-29 13:51:49,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:51:49,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:49,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:51:49,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:51:49,381 INFO L87 Difference]: Start difference. First operand 8522 states and 13097 transitions. Second operand 6 states. [2020-10-29 13:51:49,704 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:51:50,925 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:51:51,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:51,674 INFO L93 Difference]: Finished difference Result 25488 states and 39213 transitions. [2020-10-29 13:51:51,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:51:51,675 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-29 13:51:51,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:51,754 INFO L225 Difference]: With dead ends: 25488 [2020-10-29 13:51:51,754 INFO L226 Difference]: Without dead ends: 17005 [2020-10-29 13:51:51,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:51:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17005 states. [2020-10-29 13:51:52,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17005 to 17002. [2020-10-29 13:51:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17002 states. [2020-10-29 13:51:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17002 states to 17002 states and 26025 transitions. [2020-10-29 13:51:53,056 INFO L78 Accepts]: Start accepts. Automaton has 17002 states and 26025 transitions. Word has length 72 [2020-10-29 13:51:53,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:51:53,056 INFO L481 AbstractCegarLoop]: Abstraction has 17002 states and 26025 transitions. [2020-10-29 13:51:53,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:51:53,057 INFO L276 IsEmpty]: Start isEmpty. Operand 17002 states and 26025 transitions. [2020-10-29 13:51:53,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:51:53,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:53,058 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 13:51:53,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:51:53,059 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:53,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1879711322, now seen corresponding path program 1 times [2020-10-29 13:51:53,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:53,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585918383] [2020-10-29 13:51:53,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:53,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:53,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:53,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:51:53,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:53,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-29 13:51:53,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:53,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:53,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:51:53,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-29 13:51:53,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:51:53,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:53,624 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:51:53,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:53,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:53,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:53,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:53,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:53,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:51:53,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:53,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:53,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:51:53,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:53,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:51:53,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:51:53,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585918383] [2020-10-29 13:51:53,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:51:53,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:51:53,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495897184] [2020-10-29 13:51:53,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:51:53,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:53,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:51:53,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:51:53,669 INFO L87 Difference]: Start difference. First operand 17002 states and 26025 transitions. Second operand 5 states. [2020-10-29 13:51:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:56,805 INFO L93 Difference]: Finished difference Result 34605 states and 52651 transitions. [2020-10-29 13:51:56,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:51:56,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-29 13:51:56,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:56,886 INFO L225 Difference]: With dead ends: 34605 [2020-10-29 13:51:56,886 INFO L226 Difference]: Without dead ends: 34602 [2020-10-29 13:51:56,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:51:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34602 states. [2020-10-29 13:51:58,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34602 to 17642. [2020-10-29 13:51:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17642 states. [2020-10-29 13:51:58,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17642 states to 17642 states and 26665 transitions. [2020-10-29 13:51:58,141 INFO L78 Accepts]: Start accepts. Automaton has 17642 states and 26665 transitions. Word has length 72 [2020-10-29 13:51:58,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:51:58,141 INFO L481 AbstractCegarLoop]: Abstraction has 17642 states and 26665 transitions. [2020-10-29 13:51:58,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:51:58,142 INFO L276 IsEmpty]: Start isEmpty. Operand 17642 states and 26665 transitions. [2020-10-29 13:51:58,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:51:58,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:58,143 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 13:51:58,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:51:58,143 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:58,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:58,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1560564422, now seen corresponding path program 1 times [2020-10-29 13:51:58,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:58,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157869014] [2020-10-29 13:51:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:58,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:58,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:58,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:51:58,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:58,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-29 13:51:58,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:58,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:58,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:51:58,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:51:58,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:51:58,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:58,744 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:51:58,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:58,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:58,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:58,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:58,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:58,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:51:58,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:58,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:58,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:51:58,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:58,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:51:58,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:51:58,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157869014] [2020-10-29 13:51:58,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:51:58,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:51:58,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594554087] [2020-10-29 13:51:58,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:51:58,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:58,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:51:58,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:51:58,804 INFO L87 Difference]: Start difference. First operand 17642 states and 26665 transitions. Second operand 4 states. [2020-10-29 13:51:59,144 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:52:01,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:52:01,742 INFO L93 Difference]: Finished difference Result 49168 states and 73941 transitions. [2020-10-29 13:52:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:52:01,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-29 13:52:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:52:01,820 INFO L225 Difference]: With dead ends: 49168 [2020-10-29 13:52:01,820 INFO L226 Difference]: Without dead ends: 31565 [2020-10-29 13:52:01,858 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 13:52:01,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31565 states. [2020-10-29 13:52:04,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31565 to 31274. [2020-10-29 13:52:04,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31274 states. [2020-10-29 13:52:04,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31274 states to 31274 states and 46449 transitions. [2020-10-29 13:52:04,176 INFO L78 Accepts]: Start accepts. Automaton has 31274 states and 46449 transitions. Word has length 73 [2020-10-29 13:52:04,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:52:04,177 INFO L481 AbstractCegarLoop]: Abstraction has 31274 states and 46449 transitions. [2020-10-29 13:52:04,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:52:04,177 INFO L276 IsEmpty]: Start isEmpty. Operand 31274 states and 46449 transitions. [2020-10-29 13:52:04,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:52:04,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:52:04,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:52:04,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:52:04,178 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:52:04,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:52:04,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1647096423, now seen corresponding path program 1 times [2020-10-29 13:52:04,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:52:04,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762004979] [2020-10-29 13:52:04,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:52:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:04,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:04,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:04,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:04,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:52:04,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:52:04,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-29 13:52:04,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:04,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:04,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:52:04,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:52:04,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:52:04,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:52:04,924 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:52:04,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:52:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:04,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:04,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:04,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:52:04,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:52:04,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:52:04,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:04,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:04,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:52:04,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:52:04,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:52:04,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:52:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:52:04,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762004979] [2020-10-29 13:52:04,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:52:04,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:52:04,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481185174] [2020-10-29 13:52:04,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:52:04,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:52:04,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:52:04,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:52:04,982 INFO L87 Difference]: Start difference. First operand 31274 states and 46449 transitions. Second operand 5 states. [2020-10-29 13:52:05,454 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:52:06,516 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:52:07,772 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:52:09,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:52:09,941 INFO L93 Difference]: Finished difference Result 66003 states and 98775 transitions. [2020-10-29 13:52:09,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:52:09,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-29 13:52:09,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:52:10,048 INFO L225 Difference]: With dead ends: 66003 [2020-10-29 13:52:10,048 INFO L226 Difference]: Without dead ends: 48400 [2020-10-29 13:52:10,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:52:10,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48400 states. [2020-10-29 13:52:13,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48400 to 48074. [2020-10-29 13:52:13,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48074 states. [2020-10-29 13:52:13,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48074 states to 48074 states and 71185 transitions. [2020-10-29 13:52:13,513 INFO L78 Accepts]: Start accepts. Automaton has 48074 states and 71185 transitions. Word has length 73 [2020-10-29 13:52:13,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:52:13,514 INFO L481 AbstractCegarLoop]: Abstraction has 48074 states and 71185 transitions. [2020-10-29 13:52:13,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:52:13,514 INFO L276 IsEmpty]: Start isEmpty. Operand 48074 states and 71185 transitions. [2020-10-29 13:52:13,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:52:13,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:52:13,515 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 13:52:13,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:52:13,516 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:52:13,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:52:13,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1838369665, now seen corresponding path program 1 times [2020-10-29 13:52:13,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:52:13,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251653030] [2020-10-29 13:52:13,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:52:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:13,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:13,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:13,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:14,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:15,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:15,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:52:15,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:52:15,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2318 [2020-10-29 13:52:15,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:15,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:15,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:52:15,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:52:15,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:52:15,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:52:16,292 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:52:16,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:52:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:16,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:16,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:16,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:52:16,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:52:16,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 13:52:16,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:16,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:16,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:52:16,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:52:16,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:52:16,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:52:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:52:16,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251653030] [2020-10-29 13:52:16,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:52:16,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:52:16,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234181979] [2020-10-29 13:52:16,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:52:16,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:52:16,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:52:16,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:52:16,377 INFO L87 Difference]: Start difference. First operand 48074 states and 71185 transitions. Second operand 7 states. [2020-10-29 13:52:16,733 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:52:23,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:52:23,535 INFO L93 Difference]: Finished difference Result 127280 states and 187839 transitions. [2020-10-29 13:52:23,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:52:23,535 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-29 13:52:23,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:52:23,896 INFO L225 Difference]: With dead ends: 127280 [2020-10-29 13:52:23,897 INFO L226 Difference]: Without dead ends: 94635 [2020-10-29 13:52:23,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:52:24,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94635 states. [2020-10-29 13:52:27,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94635 to 48082. [2020-10-29 13:52:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48082 states. [2020-10-29 13:52:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48082 states to 48082 states and 71196 transitions. [2020-10-29 13:52:27,958 INFO L78 Accepts]: Start accepts. Automaton has 48082 states and 71196 transitions. Word has length 74 [2020-10-29 13:52:27,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:52:27,958 INFO L481 AbstractCegarLoop]: Abstraction has 48082 states and 71196 transitions. [2020-10-29 13:52:27,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:52:27,958 INFO L276 IsEmpty]: Start isEmpty. Operand 48082 states and 71196 transitions. [2020-10-29 13:52:27,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:52:27,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:52:27,989 INFO L422 BasicCegarLoop]: trace histogram [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 13:52:27,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:52:27,989 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:52:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:52:27,990 INFO L82 PathProgramCache]: Analyzing trace with hash -968027508, now seen corresponding path program 1 times [2020-10-29 13:52:27,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:52:27,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040402680] [2020-10-29 13:52:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:52:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:28,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:28,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:28,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:28,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:28,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:29,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:29,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:29,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:33,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:33,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:52:33,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:52:33,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:52:33,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:33,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:33,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:52:33,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:52:33,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 13:52:33,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:52:33,439 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:52:33,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:52:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:33,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:33,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:33,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:52:33,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:52:33,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:52:33,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:33,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:33,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:52:33,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:52:33,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:52:33,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:52:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:52:33,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040402680] [2020-10-29 13:52:33,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:52:33,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:52:33,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173603114] [2020-10-29 13:52:33,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:52:33,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:52:33,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:52:33,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:52:33,514 INFO L87 Difference]: Start difference. First operand 48082 states and 71196 transitions. Second operand 8 states. [2020-10-29 13:52:33,859 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:52:36,491 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:52:37,244 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:52:46,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:52:46,949 INFO L93 Difference]: Finished difference Result 181007 states and 267540 transitions. [2020-10-29 13:52:46,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:52:46,950 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2020-10-29 13:52:46,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:52:47,341 INFO L225 Difference]: With dead ends: 181007 [2020-10-29 13:52:47,342 INFO L226 Difference]: Without dead ends: 160524 [2020-10-29 13:52:47,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:52:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160524 states. [2020-10-29 13:52:54,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160524 to 77794. [2020-10-29 13:52:54,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77794 states. [2020-10-29 13:52:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77794 states to 77794 states and 114604 transitions. [2020-10-29 13:52:55,040 INFO L78 Accepts]: Start accepts. Automaton has 77794 states and 114604 transitions. Word has length 99 [2020-10-29 13:52:55,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:52:55,041 INFO L481 AbstractCegarLoop]: Abstraction has 77794 states and 114604 transitions. [2020-10-29 13:52:55,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:52:55,041 INFO L276 IsEmpty]: Start isEmpty. Operand 77794 states and 114604 transitions. [2020-10-29 13:52:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:52:55,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:52:55,072 INFO L422 BasicCegarLoop]: trace histogram [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 13:52:55,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:52:55,072 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:52:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:52:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1377019383, now seen corresponding path program 1 times [2020-10-29 13:52:55,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:52:55,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506236799] [2020-10-29 13:52:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:52:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:55,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:55,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:55,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:56,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:00,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:53:00,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:53:00,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:53:00,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:53:00,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:53:00,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:53:00,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:53:00,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:53:00,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-29 13:53:00,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:53:00,455 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:53:00,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:53:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:53:00,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:00,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:53:00,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:53:00,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:53:00,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:53:00,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:53:00,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:53:00,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:53:00,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:53:00,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:53:00,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:53:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 13:53:00,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506236799] [2020-10-29 13:53:00,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:53:00,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 13:53:00,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781696253] [2020-10-29 13:53:00,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:53:00,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:53:00,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:53:00,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:53:00,511 INFO L87 Difference]: Start difference. First operand 77794 states and 114604 transitions. Second operand 8 states. [2020-10-29 13:53:00,880 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:53:03,217 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:53:03,525 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:53:03,914 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:53:04,861 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:53:05,183 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:53:05,547 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:53:15,188 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:53:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:53:21,836 INFO L93 Difference]: Finished difference Result 270588 states and 402545 transitions. [2020-10-29 13:53:21,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 13:53:21,837 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2020-10-29 13:53:21,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:53:22,294 INFO L225 Difference]: With dead ends: 270588 [2020-10-29 13:53:22,295 INFO L226 Difference]: Without dead ends: 232897 [2020-10-29 13:53:22,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-29 13:53:22,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232897 states. [2020-10-29 13:53:35,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232897 to 138066. [2020-10-29 13:53:35,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138066 states. [2020-10-29 13:53:35,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138066 states to 138066 states and 203732 transitions. [2020-10-29 13:53:35,723 INFO L78 Accepts]: Start accepts. Automaton has 138066 states and 203732 transitions. Word has length 99 [2020-10-29 13:53:35,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:53:35,724 INFO L481 AbstractCegarLoop]: Abstraction has 138066 states and 203732 transitions. [2020-10-29 13:53:35,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:53:35,724 INFO L276 IsEmpty]: Start isEmpty. Operand 138066 states and 203732 transitions. [2020-10-29 13:53:35,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:53:35,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:53:35,756 INFO L422 BasicCegarLoop]: trace histogram [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 13:53:35,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:53:35,757 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:53:35,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:53:35,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1505283976, now seen corresponding path program 1 times [2020-10-29 13:53:35,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:53:35,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974953049] [2020-10-29 13:53:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:53:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:53:36,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:36,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:36,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:36,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:36,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:36,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:37,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:40,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:53:40,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:53:40,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:53:40,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:53:40,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:53:40,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:53:40,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:53:40,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:53:40,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-29 13:53:40,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:53:41,281 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:53:41,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:53:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:53:41,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:53:41,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:53:41,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:53:41,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:53:41,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:53:41,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:53:41,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:53:41,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:53:41,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:53:41,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:53:41,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:53:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:53:41,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974953049] [2020-10-29 13:53:41,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:53:41,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:53:41,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585596882] [2020-10-29 13:53:41,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:53:41,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:53:41,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:53:41,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:53:41,370 INFO L87 Difference]: Start difference. First operand 138066 states and 203732 transitions. Second operand 8 states. [2020-10-29 13:53:41,713 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:53:45,484 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:53:46,758 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:54:17,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:54:17,610 INFO L93 Difference]: Finished difference Result 470576 states and 692018 transitions. [2020-10-29 13:54:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:54:17,610 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2020-10-29 13:54:17,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:54:18,356 INFO L225 Difference]: With dead ends: 470576 [2020-10-29 13:54:18,356 INFO L226 Difference]: Without dead ends: 332557 [2020-10-29 13:54:18,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:54:18,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332557 states.