/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.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:44:21,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:44:21,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:44:21,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:44:21,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:44:21,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:44:21,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:44:21,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:44:21,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:44:21,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:44:21,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:44:21,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:44:21,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:44:21,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:44:21,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:44:21,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:44:21,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:44:21,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:44:21,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:44:21,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:44:21,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:44:21,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:44:21,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:44:21,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:44:21,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:44:21,266 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:44:21,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:44:21,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:44:21,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:44:21,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:44:21,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:44:21,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:44:21,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:44:21,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:44:21,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:44:21,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:44:21,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:44:21,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:44:21,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:44:21,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:44:21,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:44:21,280 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 13:44:21,338 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:44:21,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:44:21,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:44:21,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:44:21,341 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:44:21,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:44:21,341 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:44:21,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:44:21,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:44:21,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:44:21,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:44:21,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:44:21,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:44:21,343 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:44:21,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:44:21,343 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:44:21,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:44:21,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:44:21,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:44:21,344 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:44:21,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:44:21,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:44:21,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:44:21,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:44:21,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:44:21,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:44:21,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:44:21,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:44:21,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:44:21,346 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:44:21,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:44:21,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:44:21,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:44:21,839 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:44:21,840 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:44:21,841 INFO L432 ainManager$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.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 13:44:21,918 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d03ba6d6e/ecf6c6878bdb45f6a437785de3ef8c47/FLAG402cbd1b3 [2020-10-29 13:44:22,664 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:44:22,665 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 13:44:22,684 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d03ba6d6e/ecf6c6878bdb45f6a437785de3ef8c47/FLAG402cbd1b3 [2020-10-29 13:44:22,971 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d03ba6d6e/ecf6c6878bdb45f6a437785de3ef8c47 [2020-10-29 13:44:22,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:44:22,982 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:44:22,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:44:22,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:44:22,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:44:22,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:44:22" (1/1) ... [2020-10-29 13:44:22,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dd82222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:22, skipping insertion in model container [2020-10-29 13:44:22,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:44:22" (1/1) ... [2020-10-29 13:44:23,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:44:23,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:44:23,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:44:23,404 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:44:23,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:44:23,523 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:44:23,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:23 WrapperNode [2020-10-29 13:44:23,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:44:23,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:44:23,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:44:23,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:44:23,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:23" (1/1) ... [2020-10-29 13:44:23,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:23" (1/1) ... [2020-10-29 13:44:23,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:23" (1/1) ... [2020-10-29 13:44:23,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:23" (1/1) ... [2020-10-29 13:44:23,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:23" (1/1) ... [2020-10-29 13:44:23,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:23" (1/1) ... [2020-10-29 13:44:23,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:23" (1/1) ... [2020-10-29 13:44:23,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:44:23,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:44:23,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:44:23,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:44:23,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:23" (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 13:44:23,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:44:23,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:44:23,709 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:44:23,709 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:44:23,709 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:44:23,710 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:44:23,710 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:44:23,710 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:44:23,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:44:23,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:44:23,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:44:23,711 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:44:23,711 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:44:23,711 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:44:23,711 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:44:23,711 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:44:23,711 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:44:23,711 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:44:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:44:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:44:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:44:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:44:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:44:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:44:23,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:44:23,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:44:23,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:44:23,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:44:24,751 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:44:24,752 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:44:24,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:44:24 BoogieIcfgContainer [2020-10-29 13:44:24,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:44:24,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:44:24,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:44:24,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:44:24,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:44:22" (1/3) ... [2020-10-29 13:44:24,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c303eee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:44:24, skipping insertion in model container [2020-10-29 13:44:24,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:23" (2/3) ... [2020-10-29 13:44:24,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c303eee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:44:24, skipping insertion in model container [2020-10-29 13:44:24,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:44:24" (3/3) ... [2020-10-29 13:44:24,764 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 13:44:24,776 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:44:24,781 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:44:24,793 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:44:24,820 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:44:24,820 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:44:24,820 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:44:24,820 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:44:24,820 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:44:24,821 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:44:24,821 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:44:24,821 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:44:24,843 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states. [2020-10-29 13:44:24,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:44:24,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:24,855 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 13:44:24,855 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:24,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1986643699, now seen corresponding path program 1 times [2020-10-29 13:44:24,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:24,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577974063] [2020-10-29 13:44:24,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:25,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:25,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:25,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:28,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:28,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:44:28,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:44:28,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3291 [2020-10-29 13:44:28,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:28,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:28,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:44:28,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:44:28,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:44:28,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 13:44:28,926 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:28,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:28,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:28,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:28,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:28,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:28,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 13:44:28,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:28,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:28,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:28,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:28,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:28,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:29,016 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 13:44:29,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577974063] [2020-10-29 13:44:29,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:29,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:44:29,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115342977] [2020-10-29 13:44:29,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:44:29,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:29,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:44:29,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:44:29,052 INFO L87 Difference]: Start difference. First operand 180 states. Second operand 7 states. [2020-10-29 13:44:29,442 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:44:30,396 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:44:30,592 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:44:30,811 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:44:31,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:31,256 INFO L93 Difference]: Finished difference Result 625 states and 1005 transitions. [2020-10-29 13:44:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:44:31,260 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-29 13:44:31,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:31,304 INFO L225 Difference]: With dead ends: 625 [2020-10-29 13:44:31,304 INFO L226 Difference]: Without dead ends: 521 [2020-10-29 13:44:31,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:44:31,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2020-10-29 13:44:31,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 266. [2020-10-29 13:44:31,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-29 13:44:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 395 transitions. [2020-10-29 13:44:31,391 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 395 transitions. Word has length 69 [2020-10-29 13:44:31,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:31,393 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 395 transitions. [2020-10-29 13:44:31,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:44:31,394 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 395 transitions. [2020-10-29 13:44:31,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:44:31,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:31,401 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 13:44:31,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:44:31,402 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:31,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:31,406 INFO L82 PathProgramCache]: Analyzing trace with hash -913594550, now seen corresponding path program 1 times [2020-10-29 13:44:31,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:31,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523600913] [2020-10-29 13:44:31,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:31,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:31,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:32,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:32,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:44:32,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:44:32,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 949 [2020-10-29 13:44:32,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:32,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:32,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:44:32,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:44:32,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:44:32,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 13:44:32,726 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:32,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:32,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:32,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:32,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:32,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:32,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:44:32,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:32,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:32,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:32,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:32,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:32,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:32,847 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 13:44:32,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523600913] [2020-10-29 13:44:32,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:32,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:44:32,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498806239] [2020-10-29 13:44:32,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:44:32,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:32,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:44:32,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:44:32,856 INFO L87 Difference]: Start difference. First operand 266 states and 395 transitions. Second operand 7 states. [2020-10-29 13:44:33,944 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:44:34,177 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:44:34,355 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:44:34,539 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:44:35,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:35,405 INFO L93 Difference]: Finished difference Result 978 states and 1495 transitions. [2020-10-29 13:44:35,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:44:35,406 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-10-29 13:44:35,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:35,416 INFO L225 Difference]: With dead ends: 978 [2020-10-29 13:44:35,416 INFO L226 Difference]: Without dead ends: 775 [2020-10-29 13:44:35,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:44:35,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2020-10-29 13:44:35,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 766. [2020-10-29 13:44:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 766 states. [2020-10-29 13:44:35,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1162 transitions. [2020-10-29 13:44:35,517 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1162 transitions. Word has length 70 [2020-10-29 13:44:35,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:35,517 INFO L481 AbstractCegarLoop]: Abstraction has 766 states and 1162 transitions. [2020-10-29 13:44:35,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:44:35,518 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1162 transitions. [2020-10-29 13:44:35,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:44:35,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:35,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:35,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:44:35,523 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:35,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:35,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1959112284, now seen corresponding path program 1 times [2020-10-29 13:44:35,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:35,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076885733] [2020-10-29 13:44:35,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:35,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:35,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:36,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:36,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:44:36,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:44:36,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-29 13:44:36,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:36,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:36,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:44:36,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:36,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:44:36,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:44:36,513 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:36,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:36,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:36,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:36,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:36,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:36,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-29 13:44:36,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:36,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:36,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:36,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:36,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:36,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:36,590 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 13:44:36,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076885733] [2020-10-29 13:44:36,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:36,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:44:36,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373187729] [2020-10-29 13:44:36,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:44:36,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:36,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:44:36,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:44:36,593 INFO L87 Difference]: Start difference. First operand 766 states and 1162 transitions. Second operand 6 states. [2020-10-29 13:44:36,817 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:44:37,414 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:44:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:37,850 INFO L93 Difference]: Finished difference Result 2046 states and 3140 transitions. [2020-10-29 13:44:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:44:37,850 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-29 13:44:37,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:37,863 INFO L225 Difference]: With dead ends: 2046 [2020-10-29 13:44:37,863 INFO L226 Difference]: Without dead ends: 1331 [2020-10-29 13:44:37,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:44:37,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2020-10-29 13:44:37,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1328. [2020-10-29 13:44:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1328 states. [2020-10-29 13:44:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 2021 transitions. [2020-10-29 13:44:38,003 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 2021 transitions. Word has length 71 [2020-10-29 13:44:38,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:38,003 INFO L481 AbstractCegarLoop]: Abstraction has 1328 states and 2021 transitions. [2020-10-29 13:44:38,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:44:38,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 2021 transitions. [2020-10-29 13:44:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:44:38,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:38,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:38,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:44:38,016 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:38,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:38,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1759600619, now seen corresponding path program 1 times [2020-10-29 13:44:38,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:38,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126595523] [2020-10-29 13:44:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:38,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:38,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:38,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:38,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:44:38,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:44:38,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-29 13:44:38,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:38,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:38,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:44:38,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:38,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:44:38,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:38,874 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:38,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:38,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:38,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:38,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:38,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:38,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:44:38,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:38,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:38,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:38,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:38,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:38,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:38,939 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 13:44:38,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126595523] [2020-10-29 13:44:38,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:38,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:44:38,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819666338] [2020-10-29 13:44:38,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:44:38,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:38,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:44:38,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:44:38,943 INFO L87 Difference]: Start difference. First operand 1328 states and 2021 transitions. Second operand 6 states. [2020-10-29 13:44:39,167 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:44:39,790 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:44:40,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:40,300 INFO L93 Difference]: Finished difference Result 3621 states and 5558 transitions. [2020-10-29 13:44:40,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:44:40,300 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-29 13:44:40,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:40,314 INFO L225 Difference]: With dead ends: 3621 [2020-10-29 13:44:40,315 INFO L226 Difference]: Without dead ends: 2367 [2020-10-29 13:44:40,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:44:40,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2020-10-29 13:44:40,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 2364. [2020-10-29 13:44:40,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2364 states. [2020-10-29 13:44:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 3601 transitions. [2020-10-29 13:44:40,487 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 3601 transitions. Word has length 71 [2020-10-29 13:44:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:40,490 INFO L481 AbstractCegarLoop]: Abstraction has 2364 states and 3601 transitions. [2020-10-29 13:44:40,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:44:40,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 3601 transitions. [2020-10-29 13:44:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:44:40,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:40,493 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, 1, 1, 1] [2020-10-29 13:44:40,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:44:40,493 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:40,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:40,494 INFO L82 PathProgramCache]: Analyzing trace with hash 731374970, now seen corresponding path program 1 times [2020-10-29 13:44:40,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:40,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780341471] [2020-10-29 13:44:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:40,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:40,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:41,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:41,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:44:41,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:44:41,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-10-29 13:44:41,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:41,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:41,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:44:41,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:41,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:44:41,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:41,359 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:41,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:41,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:41,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:41,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:41,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:41,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:44:41,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:41,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:41,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:41,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:41,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:41,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:41,419 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 13:44:41,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780341471] [2020-10-29 13:44:41,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:41,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:44:41,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421285225] [2020-10-29 13:44:41,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:44:41,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:41,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:44:41,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:44:41,421 INFO L87 Difference]: Start difference. First operand 2364 states and 3601 transitions. Second operand 6 states. [2020-10-29 13:44:41,627 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:44:42,277 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:44:42,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:42,924 INFO L93 Difference]: Finished difference Result 6586 states and 10097 transitions. [2020-10-29 13:44:42,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:44:42,925 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-29 13:44:42,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:42,953 INFO L225 Difference]: With dead ends: 6586 [2020-10-29 13:44:42,953 INFO L226 Difference]: Without dead ends: 4323 [2020-10-29 13:44:42,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:44:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4323 states. [2020-10-29 13:44:43,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4323 to 4320. [2020-10-29 13:44:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4320 states. [2020-10-29 13:44:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4320 states to 4320 states and 6581 transitions. [2020-10-29 13:44:43,319 INFO L78 Accepts]: Start accepts. Automaton has 4320 states and 6581 transitions. Word has length 71 [2020-10-29 13:44:43,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:43,319 INFO L481 AbstractCegarLoop]: Abstraction has 4320 states and 6581 transitions. [2020-10-29 13:44:43,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:44:43,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4320 states and 6581 transitions. [2020-10-29 13:44:43,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:44:43,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:43,322 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 13:44:43,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:44:43,322 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:43,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:43,323 INFO L82 PathProgramCache]: Analyzing trace with hash 898027910, now seen corresponding path program 1 times [2020-10-29 13:44:43,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:43,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180381889] [2020-10-29 13:44:43,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:43,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:43,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:43,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:43,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:44:43,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:44:43,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-29 13:44:43,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:43,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:43,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:44:43,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:43,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:44:43,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:44,180 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:44,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:44,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:44,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:44,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:44,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:44,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:44:44,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:44,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:44,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:44,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:44,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:44,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:44,249 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 13:44:44,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180381889] [2020-10-29 13:44:44,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:44,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:44:44,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9408121] [2020-10-29 13:44:44,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:44:44,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:44,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:44:44,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:44:44,254 INFO L87 Difference]: Start difference. First operand 4320 states and 6581 transitions. Second operand 6 states. [2020-10-29 13:44:44,469 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:44:45,084 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:44:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:46,034 INFO L93 Difference]: Finished difference Result 12610 states and 19246 transitions. [2020-10-29 13:44:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:44:46,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-29 13:44:46,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:46,081 INFO L225 Difference]: With dead ends: 12610 [2020-10-29 13:44:46,081 INFO L226 Difference]: Without dead ends: 8343 [2020-10-29 13:44:46,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:44:46,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8343 states. [2020-10-29 13:44:46,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8343 to 8340. [2020-10-29 13:44:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8340 states. [2020-10-29 13:44:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8340 states to 8340 states and 12657 transitions. [2020-10-29 13:44:46,822 INFO L78 Accepts]: Start accepts. Automaton has 8340 states and 12657 transitions. Word has length 72 [2020-10-29 13:44:46,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:46,822 INFO L481 AbstractCegarLoop]: Abstraction has 8340 states and 12657 transitions. [2020-10-29 13:44:46,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:44:46,822 INFO L276 IsEmpty]: Start isEmpty. Operand 8340 states and 12657 transitions. [2020-10-29 13:44:46,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:44:46,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:46,826 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 13:44:46,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:44:46,826 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:46,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:46,827 INFO L82 PathProgramCache]: Analyzing trace with hash 84183615, now seen corresponding path program 1 times [2020-10-29 13:44:46,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:46,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629524316] [2020-10-29 13:44:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:46,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:46,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:47,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:49,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:49,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:44:49,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:44:49,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2304 [2020-10-29 13:44:49,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:49,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:49,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:44:49,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:44:49,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:44:49,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:49,575 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:49,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:49,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:49,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:49,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:49,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:49,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:44:49,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:49,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:49,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:49,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:49,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:49,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:49,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629524316] [2020-10-29 13:44:49,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:49,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:44:49,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379130032] [2020-10-29 13:44:49,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:44:49,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:49,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:44:49,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:44:49,632 INFO L87 Difference]: Start difference. First operand 8340 states and 12657 transitions. Second operand 9 states. [2020-10-29 13:44:49,871 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:44:51,232 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:44:51,459 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:44:55,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:55,349 INFO L93 Difference]: Finished difference Result 47392 states and 71913 transitions. [2020-10-29 13:44:55,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:44:55,350 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:44:55,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:55,480 INFO L225 Difference]: With dead ends: 47392 [2020-10-29 13:44:55,480 INFO L226 Difference]: Without dead ends: 41335 [2020-10-29 13:44:55,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2020-10-29 13:44:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41335 states. [2020-10-29 13:44:56,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41335 to 8482. [2020-10-29 13:44:56,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8482 states. [2020-10-29 13:44:57,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8482 states to 8482 states and 12841 transitions. [2020-10-29 13:44:57,004 INFO L78 Accepts]: Start accepts. Automaton has 8482 states and 12841 transitions. Word has length 72 [2020-10-29 13:44:57,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:57,005 INFO L481 AbstractCegarLoop]: Abstraction has 8482 states and 12841 transitions. [2020-10-29 13:44:57,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:44:57,006 INFO L276 IsEmpty]: Start isEmpty. Operand 8482 states and 12841 transitions. [2020-10-29 13:44:57,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:44:57,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:57,009 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 13:44:57,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:44:57,010 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:57,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:57,011 INFO L82 PathProgramCache]: Analyzing trace with hash 664362655, now seen corresponding path program 1 times [2020-10-29 13:44:57,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:57,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981605091] [2020-10-29 13:44:57,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:57,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:57,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:57,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:58,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:58,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:44:58,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:44:58,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1363 [2020-10-29 13:44:58,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:58,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:58,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:44:58,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:44:58,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:44:58,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:58,773 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:58,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:58,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:58,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:58,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:58,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:58,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:44:58,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:58,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:58,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:58,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:58,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:58,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:58,817 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 13:44:58,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981605091] [2020-10-29 13:44:58,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:58,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:44:58,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585031375] [2020-10-29 13:44:58,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:44:58,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:58,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:44:58,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:44:58,820 INFO L87 Difference]: Start difference. First operand 8482 states and 12841 transitions. Second operand 9 states. [2020-10-29 13:44:59,128 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:45:00,585 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:45:00,817 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:45:05,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:05,672 INFO L93 Difference]: Finished difference Result 41192 states and 62093 transitions. [2020-10-29 13:45:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:45:05,673 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:45:05,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:05,775 INFO L225 Difference]: With dead ends: 41192 [2020-10-29 13:45:05,776 INFO L226 Difference]: Without dead ends: 38022 [2020-10-29 13:45:05,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2020-10-29 13:45:05,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38022 states. [2020-10-29 13:45:06,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38022 to 8705. [2020-10-29 13:45:06,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8705 states. [2020-10-29 13:45:06,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8705 states to 8705 states and 13142 transitions. [2020-10-29 13:45:06,992 INFO L78 Accepts]: Start accepts. Automaton has 8705 states and 13142 transitions. Word has length 72 [2020-10-29 13:45:06,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:06,992 INFO L481 AbstractCegarLoop]: Abstraction has 8705 states and 13142 transitions. [2020-10-29 13:45:06,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:45:06,992 INFO L276 IsEmpty]: Start isEmpty. Operand 8705 states and 13142 transitions. [2020-10-29 13:45:06,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:45:06,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:06,997 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 13:45:06,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:45:06,997 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:06,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:06,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1195242239, now seen corresponding path program 1 times [2020-10-29 13:45:06,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:06,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344214877] [2020-10-29 13:45:06,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:07,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:07,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:07,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:09,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:09,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:45:09,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:45:09,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2143 [2020-10-29 13:45:09,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:09,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:09,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:45:09,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:45:09,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:45:09,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:09,565 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:45:09,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:09,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:09,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:09,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:09,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:09,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:45:09,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:09,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:09,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:09,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:09,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:09,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:09,617 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 13:45:09,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344214877] [2020-10-29 13:45:09,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:09,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:45:09,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985726919] [2020-10-29 13:45:09,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:45:09,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:09,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:45:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:45:09,620 INFO L87 Difference]: Start difference. First operand 8705 states and 13142 transitions. Second operand 9 states. [2020-10-29 13:45:09,972 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:45:11,659 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:45:11,912 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:45:16,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:16,555 INFO L93 Difference]: Finished difference Result 36386 states and 54849 transitions. [2020-10-29 13:45:16,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 13:45:16,556 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:45:16,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:16,640 INFO L225 Difference]: With dead ends: 36386 [2020-10-29 13:45:16,640 INFO L226 Difference]: Without dead ends: 35154 [2020-10-29 13:45:16,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-10-29 13:45:16,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35154 states. [2020-10-29 13:45:18,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35154 to 8705. [2020-10-29 13:45:18,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8705 states. [2020-10-29 13:45:18,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8705 states to 8705 states and 13138 transitions. [2020-10-29 13:45:18,187 INFO L78 Accepts]: Start accepts. Automaton has 8705 states and 13138 transitions. Word has length 72 [2020-10-29 13:45:18,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:18,187 INFO L481 AbstractCegarLoop]: Abstraction has 8705 states and 13138 transitions. [2020-10-29 13:45:18,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:45:18,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8705 states and 13138 transitions. [2020-10-29 13:45:18,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:45:18,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:18,192 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 13:45:18,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:45:18,192 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:18,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:18,193 INFO L82 PathProgramCache]: Analyzing trace with hash 763710534, now seen corresponding path program 1 times [2020-10-29 13:45:18,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:18,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575838332] [2020-10-29 13:45:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:18,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:18,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:18,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:20,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:20,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:45:20,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:45:20,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1987 [2020-10-29 13:45:20,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:20,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:20,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:45:20,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:45:20,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:45:20,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:20,728 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:45:20,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:20,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:20,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:20,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:20,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:20,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:45:20,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:20,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:20,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:20,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:20,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:20,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:20,788 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 13:45:20,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575838332] [2020-10-29 13:45:20,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:20,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:45:20,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601705400] [2020-10-29 13:45:20,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:45:20,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:20,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:45:20,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:45:20,790 INFO L87 Difference]: Start difference. First operand 8705 states and 13138 transitions. Second operand 9 states. [2020-10-29 13:45:21,037 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:45:22,675 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:45:22,915 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:45:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:28,673 INFO L93 Difference]: Finished difference Result 45289 states and 68637 transitions. [2020-10-29 13:45:28,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:45:28,674 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2020-10-29 13:45:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:28,733 INFO L225 Difference]: With dead ends: 45289 [2020-10-29 13:45:28,734 INFO L226 Difference]: Without dead ends: 37325 [2020-10-29 13:45:28,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2020-10-29 13:45:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37325 states. [2020-10-29 13:45:30,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37325 to 8839. [2020-10-29 13:45:30,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8839 states. [2020-10-29 13:45:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8839 states to 8839 states and 13282 transitions. [2020-10-29 13:45:30,232 INFO L78 Accepts]: Start accepts. Automaton has 8839 states and 13282 transitions. Word has length 73 [2020-10-29 13:45:30,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:30,232 INFO L481 AbstractCegarLoop]: Abstraction has 8839 states and 13282 transitions. [2020-10-29 13:45:30,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:45:30,232 INFO L276 IsEmpty]: Start isEmpty. Operand 8839 states and 13282 transitions. [2020-10-29 13:45:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:45:30,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:30,237 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 13:45:30,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:45:30,237 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:30,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:30,238 INFO L82 PathProgramCache]: Analyzing trace with hash -964216977, now seen corresponding path program 1 times [2020-10-29 13:45:30,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:30,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595234538] [2020-10-29 13:45:30,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:30,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:30,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:30,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:45:30,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:30,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-29 13:45:30,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:30,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:30,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:45:30,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-29 13:45:30,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:45:30,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:30,670 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:45:30,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:30,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:30,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:30,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:30,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:30,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:45:30,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:30,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:30,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:30,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:30,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:30,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:30,700 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 13:45:30,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595234538] [2020-10-29 13:45:30,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:30,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:45:30,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504985468] [2020-10-29 13:45:30,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:45:30,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:30,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:45:30,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:45:30,703 INFO L87 Difference]: Start difference. First operand 8839 states and 13282 transitions. Second operand 5 states. [2020-10-29 13:45:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:33,742 INFO L93 Difference]: Finished difference Result 16778 states and 25268 transitions. [2020-10-29 13:45:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:45:33,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-29 13:45:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:33,769 INFO L225 Difference]: With dead ends: 16778 [2020-10-29 13:45:33,769 INFO L226 Difference]: Without dead ends: 16775 [2020-10-29 13:45:33,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 13:45:33,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16775 states. [2020-10-29 13:45:35,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16775 to 9095. [2020-10-29 13:45:35,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9095 states. [2020-10-29 13:45:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9095 states to 9095 states and 13538 transitions. [2020-10-29 13:45:35,371 INFO L78 Accepts]: Start accepts. Automaton has 9095 states and 13538 transitions. Word has length 73 [2020-10-29 13:45:35,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:35,372 INFO L481 AbstractCegarLoop]: Abstraction has 9095 states and 13538 transitions. [2020-10-29 13:45:35,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:45:35,372 INFO L276 IsEmpty]: Start isEmpty. Operand 9095 states and 13538 transitions. [2020-10-29 13:45:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:45:35,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:35,377 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 13:45:35,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:45:35,377 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:35,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:35,378 INFO L82 PathProgramCache]: Analyzing trace with hash -404823276, now seen corresponding path program 1 times [2020-10-29 13:45:35,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:35,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548942013] [2020-10-29 13:45:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:35,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:35,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:35,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:45:35,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:35,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-29 13:45:35,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:35,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:35,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:45:35,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:45:35,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:45:35,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:35,813 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:45:35,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:35,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:35,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:35,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:35,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:35,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:45:35,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:35,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:35,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:45:35,887 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 13:45:35,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548942013] [2020-10-29 13:45:35,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:35,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:45:35,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049306225] [2020-10-29 13:45:35,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:45:35,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:35,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:45:35,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:45:35,892 INFO L87 Difference]: Start difference. First operand 9095 states and 13538 transitions. Second operand 5 states. [2020-10-29 13:45:36,195 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:45:36,976 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:45:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:39,461 INFO L93 Difference]: Finished difference Result 23673 states and 35370 transitions. [2020-10-29 13:45:39,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:45:39,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-29 13:45:39,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:39,479 INFO L225 Difference]: With dead ends: 23673 [2020-10-29 13:45:39,479 INFO L226 Difference]: Without dead ends: 15734 [2020-10-29 13:45:39,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:45:39,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15734 states. [2020-10-29 13:45:41,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15734 to 15731. [2020-10-29 13:45:41,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15731 states. [2020-10-29 13:45:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15731 states to 15731 states and 23262 transitions. [2020-10-29 13:45:41,878 INFO L78 Accepts]: Start accepts. Automaton has 15731 states and 23262 transitions. Word has length 74 [2020-10-29 13:45:41,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:41,878 INFO L481 AbstractCegarLoop]: Abstraction has 15731 states and 23262 transitions. [2020-10-29 13:45:41,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:45:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand 15731 states and 23262 transitions. [2020-10-29 13:45:41,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:45:41,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:41,882 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 13:45:41,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:45:41,882 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:41,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:41,883 INFO L82 PathProgramCache]: Analyzing trace with hash -324216827, now seen corresponding path program 1 times [2020-10-29 13:45:41,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:41,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790090942] [2020-10-29 13:45:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:41,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:41,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:42,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:43,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:43,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:45:43,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:45:43,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2025 [2020-10-29 13:45:43,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:43,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:43,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:45:43,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:45:43,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 13:45:43,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:44,164 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:45:44,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:44,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:44,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:44,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:44,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:44,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:45:44,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:44,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:44,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:44,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:44,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:44,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:44,206 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 13:45:44,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790090942] [2020-10-29 13:45:44,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:44,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:45:44,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162069192] [2020-10-29 13:45:44,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:45:44,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:44,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:45:44,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:45:44,209 INFO L87 Difference]: Start difference. First operand 15731 states and 23262 transitions. Second operand 7 states. [2020-10-29 13:45:44,523 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:45:45,533 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:45:45,731 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:45:50,667 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:45:50,876 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:45:51,130 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:45:52,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:52,815 INFO L93 Difference]: Finished difference Result 46357 states and 69388 transitions. [2020-10-29 13:45:52,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:45:52,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-29 13:45:52,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:52,869 INFO L225 Difference]: With dead ends: 46357 [2020-10-29 13:45:52,870 INFO L226 Difference]: Without dead ends: 39206 [2020-10-29 13:45:52,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:45:52,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39206 states. [2020-10-29 13:45:57,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39206 to 26401. [2020-10-29 13:45:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26401 states. [2020-10-29 13:45:57,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26401 states to 26401 states and 39179 transitions. [2020-10-29 13:45:57,657 INFO L78 Accepts]: Start accepts. Automaton has 26401 states and 39179 transitions. Word has length 74 [2020-10-29 13:45:57,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:57,657 INFO L481 AbstractCegarLoop]: Abstraction has 26401 states and 39179 transitions. [2020-10-29 13:45:57,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:45:57,657 INFO L276 IsEmpty]: Start isEmpty. Operand 26401 states and 39179 transitions. [2020-10-29 13:45:57,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:45:57,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:57,662 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 13:45:57,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:45:57,662 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:57,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:57,663 INFO L82 PathProgramCache]: Analyzing trace with hash -2008585817, now seen corresponding path program 1 times [2020-10-29 13:45:57,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:57,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135390203] [2020-10-29 13:45:57,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:57,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:57,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:58,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:59,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:59,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:45:59,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:45:59,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1879 [2020-10-29 13:45:59,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:59,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:59,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:45:59,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:45:59,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 13:45:59,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:59,822 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:45:59,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:59,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:59,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:59,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:59,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:59,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:45:59,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:59,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:59,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:59,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:59,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:59,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:59,868 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 13:45:59,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135390203] [2020-10-29 13:45:59,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:59,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:45:59,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448344978] [2020-10-29 13:45:59,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:45:59,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:59,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:45:59,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:45:59,871 INFO L87 Difference]: Start difference. First operand 26401 states and 39179 transitions. Second operand 7 states. [2020-10-29 13:46:00,122 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:46:00,948 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:46:01,260 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:46:06,295 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:46:06,520 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:46:06,760 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:46:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:08,737 INFO L93 Difference]: Finished difference Result 46605 states and 69156 transitions. [2020-10-29 13:46:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:46:08,738 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-29 13:46:08,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:08,787 INFO L225 Difference]: With dead ends: 46605 [2020-10-29 13:46:08,787 INFO L226 Difference]: Without dead ends: 42490 [2020-10-29 13:46:08,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:46:08,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42490 states. [2020-10-29 13:46:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42490 to 28504. [2020-10-29 13:46:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28504 states. [2020-10-29 13:46:13,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28504 states to 28504 states and 42274 transitions. [2020-10-29 13:46:13,950 INFO L78 Accepts]: Start accepts. Automaton has 28504 states and 42274 transitions. Word has length 74 [2020-10-29 13:46:13,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:13,951 INFO L481 AbstractCegarLoop]: Abstraction has 28504 states and 42274 transitions. [2020-10-29 13:46:13,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:46:13,951 INFO L276 IsEmpty]: Start isEmpty. Operand 28504 states and 42274 transitions. [2020-10-29 13:46:13,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:46:13,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:13,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:46:13,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:46:13,956 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:13,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:13,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1274772613, now seen corresponding path program 1 times [2020-10-29 13:46:13,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:13,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971185468] [2020-10-29 13:46:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:13,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:14,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:14,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:15,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:15,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:46:15,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:46:15,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1613 [2020-10-29 13:46:15,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:15,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:15,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:46:15,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:46:15,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:46:15,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:15,825 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:46:15,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:15,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:15,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:15,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:15,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:15,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:46:15,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:15,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:15,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:46:15,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:15,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:46:15,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:15,865 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 13:46:15,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971185468] [2020-10-29 13:46:15,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:15,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:46:15,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935583201] [2020-10-29 13:46:15,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:46:15,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:15,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:46:15,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:46:15,867 INFO L87 Difference]: Start difference. First operand 28504 states and 42274 transitions. Second operand 7 states. [2020-10-29 13:46:16,094 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:46:17,011 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:46:17,240 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:46:23,179 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:46:23,544 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:46:23,764 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:46:26,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:26,195 INFO L93 Difference]: Finished difference Result 57133 states and 84958 transitions. [2020-10-29 13:46:26,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:46:26,196 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-29 13:46:26,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:26,255 INFO L225 Difference]: With dead ends: 57133 [2020-10-29 13:46:26,255 INFO L226 Difference]: Without dead ends: 45994 [2020-10-29 13:46:26,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:46:26,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45994 states. [2020-10-29 13:46:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45994 to 31769. [2020-10-29 13:46:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31769 states. [2020-10-29 13:46:32,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31769 states to 31769 states and 47104 transitions. [2020-10-29 13:46:32,205 INFO L78 Accepts]: Start accepts. Automaton has 31769 states and 47104 transitions. Word has length 74 [2020-10-29 13:46:32,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:32,205 INFO L481 AbstractCegarLoop]: Abstraction has 31769 states and 47104 transitions. [2020-10-29 13:46:32,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:46:32,205 INFO L276 IsEmpty]: Start isEmpty. Operand 31769 states and 47104 transitions. [2020-10-29 13:46:32,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:46:32,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:32,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:46:32,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:46:32,209 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:32,209 INFO L82 PathProgramCache]: Analyzing trace with hash 139498958, now seen corresponding path program 1 times [2020-10-29 13:46:32,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:32,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251148222] [2020-10-29 13:46:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:32,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:32,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:32,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:33,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:33,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:46:33,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:46:33,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1339 [2020-10-29 13:46:33,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:33,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:33,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:46:33,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:46:33,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:46:33,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:33,804 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:46:33,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:33,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:33,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:33,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:33,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:33,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:46:33,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:33,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:33,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:46:33,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:33,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:46:33,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:33,831 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 13:46:33,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251148222] [2020-10-29 13:46:33,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:33,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:46:33,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128691584] [2020-10-29 13:46:33,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:46:33,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:33,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:46:33,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:46:33,833 INFO L87 Difference]: Start difference. First operand 31769 states and 47104 transitions. Second operand 7 states. [2020-10-29 13:46:34,073 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:46:35,043 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:46:35,252 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:46:42,601 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:46:42,851 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:46:43,071 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:46:46,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:46,129 INFO L93 Difference]: Finished difference Result 65198 states and 96820 transitions. [2020-10-29 13:46:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:46:46,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2020-10-29 13:46:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:46,193 INFO L225 Difference]: With dead ends: 65198 [2020-10-29 13:46:46,193 INFO L226 Difference]: Without dead ends: 53979 [2020-10-29 13:46:46,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:46:46,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53979 states. [2020-10-29 13:46:53,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53979 to 36810. [2020-10-29 13:46:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36810 states. [2020-10-29 13:46:53,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36810 states to 36810 states and 54578 transitions. [2020-10-29 13:46:53,142 INFO L78 Accepts]: Start accepts. Automaton has 36810 states and 54578 transitions. Word has length 75 [2020-10-29 13:46:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:53,143 INFO L481 AbstractCegarLoop]: Abstraction has 36810 states and 54578 transitions. [2020-10-29 13:46:53,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:46:53,143 INFO L276 IsEmpty]: Start isEmpty. Operand 36810 states and 54578 transitions. [2020-10-29 13:46:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 13:46:53,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:53,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:46:53,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:46:53,146 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:53,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:53,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1191364456, now seen corresponding path program 1 times [2020-10-29 13:46:53,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:53,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718893991] [2020-10-29 13:46:53,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:53,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:53,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:53,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:53,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:53,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:58,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:58,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 13:46:58,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:46:58,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:46:58,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:58,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:58,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:46:58,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:46:58,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:46:58,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:46:58,417 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:46:58,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:58,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:58,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:58,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:58,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:58,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:46:58,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:58,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:58,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:46:58,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:58,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:46:58,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:58,467 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 13:46:58,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718893991] [2020-10-29 13:46:58,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:58,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:46:58,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641147231] [2020-10-29 13:46:58,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:46:58,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:58,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:46:58,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:46:58,479 INFO L87 Difference]: Start difference. First operand 36810 states and 54578 transitions. Second operand 8 states. [2020-10-29 13:46:58,710 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:46:59,897 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:47:09,079 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:47:27,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:47:27,858 INFO L93 Difference]: Finished difference Result 151471 states and 222075 transitions. [2020-10-29 13:47:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:47:27,859 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-10-29 13:47:27,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:47:28,258 INFO L225 Difference]: With dead ends: 151471 [2020-10-29 13:47:28,258 INFO L226 Difference]: Without dead ends: 136948 [2020-10-29 13:47:28,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:47:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136948 states. [2020-10-29 13:47:36,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136948 to 36880. [2020-10-29 13:47:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36880 states. [2020-10-29 13:47:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36880 states to 36880 states and 54669 transitions. [2020-10-29 13:47:36,478 INFO L78 Accepts]: Start accepts. Automaton has 36880 states and 54669 transitions. Word has length 77 [2020-10-29 13:47:36,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:47:36,478 INFO L481 AbstractCegarLoop]: Abstraction has 36880 states and 54669 transitions. [2020-10-29 13:47:36,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:47:36,478 INFO L276 IsEmpty]: Start isEmpty. Operand 36880 states and 54669 transitions. [2020-10-29 13:47:36,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 13:47:36,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:47:36,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:47:36,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:47:36,482 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:47:36,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:47:36,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2084016538, now seen corresponding path program 1 times [2020-10-29 13:47:36,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:47:36,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921927576] [2020-10-29 13:47:36,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:47:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:36,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:36,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:36,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:36,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:36,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:41,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:41,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 13:47:41,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:47:41,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:47:41,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:41,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:41,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:47:41,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:47:41,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 13:47:41,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:41,835 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:47:41,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:47:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:41,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:41,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:41,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:47:41,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:47:41,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:47:41,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:41,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:41,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:47:41,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:47:41,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:47:41,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:41,896 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 13:47:41,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921927576] [2020-10-29 13:47:41,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:47:41,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:47:41,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421217754] [2020-10-29 13:47:41,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:47:41,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:47:41,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:47:41,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:47:41,898 INFO L87 Difference]: Start difference. First operand 36880 states and 54669 transitions. Second operand 8 states. [2020-10-29 13:47:42,135 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:47:43,390 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:47:53,504 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 166