/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=SHALLOWEST --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_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 06:10:54,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 06:10:54,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 06:10:54,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 06:10:54,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 06:10:54,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 06:10:54,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 06:10:54,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 06:10:54,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 06:10:54,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 06:10:54,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 06:10:54,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 06:10:54,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 06:10:54,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 06:10:54,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 06:10:54,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 06:10:54,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 06:10:54,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 06:10:54,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 06:10:54,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 06:10:54,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 06:10:54,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 06:10:54,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 06:10:54,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 06:10:54,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 06:10:54,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 06:10:54,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 06:10:54,305 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 06:10:54,305 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 06:10:54,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 06:10:54,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 06:10:54,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 06:10:54,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 06:10:54,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 06:10:54,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 06:10:54,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 06:10:54,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 06:10:54,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 06:10:54,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 06:10:54,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 06:10:54,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 06:10:54,323 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 [2020-10-27 06:10:54,376 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 06:10:54,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 06:10:54,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 06:10:54,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 06:10:54,380 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 06:10:54,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 06:10:54,380 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 06:10:54,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 06:10:54,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 06:10:54,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 06:10:54,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 06:10:54,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 06:10:54,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 06:10:54,382 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 06:10:54,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 06:10:54,383 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 06:10:54,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 06:10:54,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 06:10:54,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 06:10:54,384 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 06:10:54,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 06:10:54,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 06:10:54,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 06:10:54,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 06:10:54,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 06:10:54,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 06:10:54,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 06:10:54,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 06:10:54,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 06:10:54,386 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 06:10:54,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 06:10:54,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 06:10:54,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 06:10:54,826 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 06:10:54,827 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 06:10:54,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 06:10:54,914 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/109f9dcf6/36f0634a4e5a45c499fd69f727bb6567/FLAG5ce55d496 [2020-10-27 06:10:55,833 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 06:10:55,834 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 06:10:55,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/109f9dcf6/36f0634a4e5a45c499fd69f727bb6567/FLAG5ce55d496 [2020-10-27 06:10:55,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/109f9dcf6/36f0634a4e5a45c499fd69f727bb6567 [2020-10-27 06:10:55,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 06:10:55,893 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 06:10:55,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 06:10:55,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 06:10:55,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 06:10:55,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:10:55" (1/1) ... [2020-10-27 06:10:55,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c10a2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:10:55, skipping insertion in model container [2020-10-27 06:10:55,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:10:55" (1/1) ... [2020-10-27 06:10:55,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 06:10:56,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 06:10:57,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:10:57,838 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 06:10:58,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:10:58,937 INFO L208 MainTranslator]: Completed translation [2020-10-27 06:10:58,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:10:58 WrapperNode [2020-10-27 06:10:58,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 06:10:58,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 06:10:58,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 06:10:58,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 06:10:58,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:10:58" (1/1) ... [2020-10-27 06:10:58,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:10:58" (1/1) ... [2020-10-27 06:10:59,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:10:58" (1/1) ... [2020-10-27 06:10:59,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:10:58" (1/1) ... [2020-10-27 06:10:59,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:10:58" (1/1) ... [2020-10-27 06:10:59,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:10:58" (1/1) ... [2020-10-27 06:10:59,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:10:58" (1/1) ... [2020-10-27 06:10:59,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 06:10:59,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 06:10:59,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 06:10:59,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 06:10:59,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:10:58" (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 [2020-10-27 06:10:59,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 06:10:59,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 06:10:59,359 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 06:10:59,360 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 06:10:59,360 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 06:10:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 06:10:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 06:10:59,361 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 06:10:59,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 06:10:59,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 06:10:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 06:10:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 06:10:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 06:10:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 06:10:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 06:10:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 06:10:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 06:10:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 06:10:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 06:10:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 06:10:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 06:10:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 06:10:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 06:10:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 06:10:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 06:10:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 06:10:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 06:10:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 06:10:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 06:10:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 06:11:04,849 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 06:11:04,849 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 06:11:04,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:11:04 BoogieIcfgContainer [2020-10-27 06:11:04,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 06:11:04,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 06:11:04,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 06:11:04,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 06:11:04,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:10:55" (1/3) ... [2020-10-27 06:11:04,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e805c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:11:04, skipping insertion in model container [2020-10-27 06:11:04,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:10:58" (2/3) ... [2020-10-27 06:11:04,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e805c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:11:04, skipping insertion in model container [2020-10-27 06:11:04,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:11:04" (3/3) ... [2020-10-27 06:11:04,862 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 06:11:04,874 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 06:11:04,889 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 06:11:04,903 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 06:11:04,940 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 06:11:04,940 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 06:11:04,940 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 06:11:04,941 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 06:11:04,941 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 06:11:04,941 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 06:11:04,941 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 06:11:04,941 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 06:11:04,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states. [2020-10-27 06:11:05,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-10-27 06:11:05,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:11:05,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:11:05,046 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:11:05,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:11:05,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1245767728, now seen corresponding path program 1 times [2020-10-27 06:11:05,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:11:05,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680361346] [2020-10-27 06:11:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:11:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:11:07,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:08,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:10,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:10,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:11,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:11,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:11:11,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 502 [2020-10-27 06:11:11,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 06:11:11,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-27 06:11:11,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:11:11,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:11:11,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:11:11,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-27 06:11:11,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 06:11:14,078 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-27 06:11:14,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:11:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:11:14,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:14,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:11:14,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:11:14,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:11:14,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 06:11:14,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:11:14,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:11:14,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:11:14,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:11:14,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:11:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:11:14,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680361346] [2020-10-27 06:11:14,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:11:14,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:11:14,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452942957] [2020-10-27 06:11:14,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:11:14,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:11:14,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:11:14,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:11:14,804 INFO L87 Difference]: Start difference. First operand 1510 states. Second operand 5 states. [2020-10-27 06:11:32,385 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-27 06:11:35,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:11:35,978 INFO L93 Difference]: Finished difference Result 4401 states and 7944 transitions. [2020-10-27 06:11:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 06:11:35,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 494 [2020-10-27 06:11:35,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:11:36,029 INFO L225 Difference]: With dead ends: 4401 [2020-10-27 06:11:36,029 INFO L226 Difference]: Without dead ends: 2932 [2020-10-27 06:11:36,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:11:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2020-10-27 06:11:36,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 2871. [2020-10-27 06:11:36,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2871 states. [2020-10-27 06:11:36,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 4710 transitions. [2020-10-27 06:11:36,313 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 4710 transitions. Word has length 494 [2020-10-27 06:11:36,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:11:36,315 INFO L481 AbstractCegarLoop]: Abstraction has 2871 states and 4710 transitions. [2020-10-27 06:11:36,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:11:36,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 4710 transitions. [2020-10-27 06:11:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-10-27 06:11:36,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:11:36,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:11:36,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 06:11:36,335 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:11:36,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:11:36,336 INFO L82 PathProgramCache]: Analyzing trace with hash -154173815, now seen corresponding path program 1 times [2020-10-27 06:11:36,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:11:36,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213248480] [2020-10-27 06:11:36,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:11:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:11:36,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:36,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:37,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:37,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:38,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:38,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:39,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:39,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:39,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:40,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:40,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:41,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:41,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:11:41,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 504 [2020-10-27 06:11:41,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 06:11:41,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5185 [2020-10-27 06:11:41,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:11:41,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:11:41,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:11:41,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 195 [2020-10-27 06:11:41,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:11:43,390 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-27 06:11:43,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:11:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:11:43,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:43,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:11:43,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:11:43,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:11:43,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 06:11:43,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:11:43,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:11:43,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:11:43,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:11:43,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:11:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:11:43,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213248480] [2020-10-27 06:11:43,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:11:43,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:11:43,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125739986] [2020-10-27 06:11:43,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:11:43,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:11:43,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:11:43,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:11:43,896 INFO L87 Difference]: Start difference. First operand 2871 states and 4710 transitions. Second operand 5 states. [2020-10-27 06:12:00,161 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-27 06:12:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:12:03,825 INFO L93 Difference]: Finished difference Result 8518 states and 13969 transitions. [2020-10-27 06:12:03,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:12:03,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2020-10-27 06:12:03,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:12:03,862 INFO L225 Difference]: With dead ends: 8518 [2020-10-27 06:12:03,863 INFO L226 Difference]: Without dead ends: 5668 [2020-10-27 06:12:03,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:12:03,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5668 states. [2020-10-27 06:12:04,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5668 to 5647. [2020-10-27 06:12:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5647 states. [2020-10-27 06:12:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5647 states to 5647 states and 9231 transitions. [2020-10-27 06:12:04,140 INFO L78 Accepts]: Start accepts. Automaton has 5647 states and 9231 transitions. Word has length 496 [2020-10-27 06:12:04,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:12:04,143 INFO L481 AbstractCegarLoop]: Abstraction has 5647 states and 9231 transitions. [2020-10-27 06:12:04,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:12:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 5647 states and 9231 transitions. [2020-10-27 06:12:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-10-27 06:12:04,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:12:04,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:12:04,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 06:12:04,169 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:12:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:12:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1190890470, now seen corresponding path program 1 times [2020-10-27 06:12:04,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:12:04,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552218430] [2020-10-27 06:12:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:12:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:12:04,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:04,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:04,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:05,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:05,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:05,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:06,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:06,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:06,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:07,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:08,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:08,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:08,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:09,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:09,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:12:09,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 506 [2020-10-27 06:12:09,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 06:12:09,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5154 [2020-10-27 06:12:09,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:12:09,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:12:09,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:12:09,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-27 06:12:09,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:12:11,032 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-27 06:12:11,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:12:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:12:11,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:11,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:12:11,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:12:11,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:12:11,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 06:12:11,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:12:11,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:12:11,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:12:11,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:12:11,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:12:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:12:11,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552218430] [2020-10-27 06:12:11,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:12:11,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:12:11,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114666326] [2020-10-27 06:12:11,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:12:11,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:12:11,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:12:11,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:12:11,455 INFO L87 Difference]: Start difference. First operand 5647 states and 9231 transitions. Second operand 5 states. [2020-10-27 06:12:28,486 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-27 06:12:32,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:12:32,673 INFO L93 Difference]: Finished difference Result 16435 states and 26792 transitions. [2020-10-27 06:12:32,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:12:32,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 498 [2020-10-27 06:12:32,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:12:32,733 INFO L225 Difference]: With dead ends: 16435 [2020-10-27 06:12:32,733 INFO L226 Difference]: Without dead ends: 11159 [2020-10-27 06:12:32,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:12:32,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11159 states. [2020-10-27 06:12:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11159 to 11095. [2020-10-27 06:12:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11095 states. [2020-10-27 06:12:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11095 states to 11095 states and 18072 transitions. [2020-10-27 06:12:33,479 INFO L78 Accepts]: Start accepts. Automaton has 11095 states and 18072 transitions. Word has length 498 [2020-10-27 06:12:33,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:12:33,480 INFO L481 AbstractCegarLoop]: Abstraction has 11095 states and 18072 transitions. [2020-10-27 06:12:33,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:12:33,480 INFO L276 IsEmpty]: Start isEmpty. Operand 11095 states and 18072 transitions. [2020-10-27 06:12:33,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-10-27 06:12:33,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:12:33,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:12:33,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 06:12:33,517 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:12:33,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:12:33,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1862337886, now seen corresponding path program 1 times [2020-10-27 06:12:33,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:12:33,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033716059] [2020-10-27 06:12:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:12:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:12:33,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:33,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:34,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:34,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:34,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:35,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:35,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:35,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:36,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:36,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:36,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:36,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:38,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:12:38,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 510 [2020-10-27 06:12:38,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 06:12:38,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-27 06:12:38,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:12:38,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:12:38,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:12:38,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-27 06:12:38,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 06:12:40,177 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-27 06:12:40,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:12:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:12:40,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:40,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:12:40,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:12:40,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:12:40,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 06:12:40,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:12:40,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:12:40,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:12:40,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:12:40,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:12:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:12:40,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033716059] [2020-10-27 06:12:40,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:12:40,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:12:40,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917736842] [2020-10-27 06:12:40,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:12:40,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:12:40,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:12:40,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:12:40,621 INFO L87 Difference]: Start difference. First operand 11095 states and 18072 transitions. Second operand 5 states. [2020-10-27 06:12:56,489 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-27 06:13:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:13:00,202 INFO L93 Difference]: Finished difference Result 32863 states and 53488 transitions. [2020-10-27 06:13:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:13:00,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 502 [2020-10-27 06:13:00,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:13:00,270 INFO L225 Difference]: With dead ends: 32863 [2020-10-27 06:13:00,270 INFO L226 Difference]: Without dead ends: 21880 [2020-10-27 06:13:00,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:13:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21880 states. [2020-10-27 06:13:01,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21880 to 21840. [2020-10-27 06:13:01,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21840 states. [2020-10-27 06:13:01,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21840 states to 21840 states and 35396 transitions. [2020-10-27 06:13:01,562 INFO L78 Accepts]: Start accepts. Automaton has 21840 states and 35396 transitions. Word has length 502 [2020-10-27 06:13:01,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:13:01,563 INFO L481 AbstractCegarLoop]: Abstraction has 21840 states and 35396 transitions. [2020-10-27 06:13:01,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:13:01,563 INFO L276 IsEmpty]: Start isEmpty. Operand 21840 states and 35396 transitions. [2020-10-27 06:13:01,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-10-27 06:13:01,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:13:01,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:13:01,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 06:13:01,618 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:13:01,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:13:01,619 INFO L82 PathProgramCache]: Analyzing trace with hash -228285083, now seen corresponding path program 1 times [2020-10-27 06:13:01,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:13:01,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417504764] [2020-10-27 06:13:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:13:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:13:01,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:01,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:01,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:02,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:02,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:02,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:03,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:03,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:03,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:05,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:05,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:06,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:06,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:13:06,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 513 [2020-10-27 06:13:06,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 06:13:06,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-27 06:13:06,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:13:06,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:13:06,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:13:06,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 215 [2020-10-27 06:13:06,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:13:08,232 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-27 06:13:08,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:13:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:13:08,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:08,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:13:08,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:13:08,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:13:08,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 06:13:08,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:13:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:13:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:13:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:13:08,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:13:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:13:08,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417504764] [2020-10-27 06:13:08,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:13:08,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:13:08,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35217597] [2020-10-27 06:13:08,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:13:08,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:13:08,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:13:08,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:13:08,608 INFO L87 Difference]: Start difference. First operand 21840 states and 35396 transitions. Second operand 5 states. [2020-10-27 06:13:25,808 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-27 06:13:29,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:13:29,884 INFO L93 Difference]: Finished difference Result 64103 states and 103761 transitions. [2020-10-27 06:13:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:13:29,886 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 505 [2020-10-27 06:13:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:13:29,998 INFO L225 Difference]: With dead ends: 64103 [2020-10-27 06:13:29,998 INFO L226 Difference]: Without dead ends: 42805 [2020-10-27 06:13:30,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:13:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42805 states. [2020-10-27 06:13:31,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42805 to 42579. [2020-10-27 06:13:31,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42579 states. [2020-10-27 06:13:31,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42579 states to 42579 states and 68619 transitions. [2020-10-27 06:13:31,853 INFO L78 Accepts]: Start accepts. Automaton has 42579 states and 68619 transitions. Word has length 505 [2020-10-27 06:13:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:13:31,853 INFO L481 AbstractCegarLoop]: Abstraction has 42579 states and 68619 transitions. [2020-10-27 06:13:31,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:13:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 42579 states and 68619 transitions. [2020-10-27 06:13:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-10-27 06:13:32,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:13:32,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:13:32,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 06:13:32,132 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:13:32,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:13:32,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1010000735, now seen corresponding path program 1 times [2020-10-27 06:13:32,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:13:32,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492342544] [2020-10-27 06:13:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:13:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:13:32,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:32,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:32,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:32,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:32,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:33,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:33,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:33,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:33,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:34,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:34,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:35,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:35,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:36,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:36,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:36,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:36,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:37,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:37,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:37,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:13:37,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 516 [2020-10-27 06:13:37,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 06:13:37,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5129 [2020-10-27 06:13:37,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:13:37,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:13:37,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:13:37,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 254 [2020-10-27 06:13:37,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:13:38,973 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-27 06:13:38,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:13:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:13:39,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:39,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:13:39,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:13:39,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:13:39,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 06:13:39,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:13:39,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:13:39,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:13:39,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 06:13:39,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:13:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:13:39,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492342544] [2020-10-27 06:13:39,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:13:39,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 06:13:39,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481550779] [2020-10-27 06:13:39,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 06:13:39,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:13:39,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 06:13:39,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 06:13:39,388 INFO L87 Difference]: Start difference. First operand 42579 states and 68619 transitions. Second operand 9 states. [2020-10-27 06:13:40,862 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-27 06:13:56,163 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 442 [2020-10-27 06:13:57,663 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 440 [2020-10-27 06:14:02,580 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 440 [2020-10-27 06:14:03,979 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 438 [2020-10-27 06:14:05,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:14:05,037 INFO L93 Difference]: Finished difference Result 101777 states and 162029 transitions. [2020-10-27 06:14:05,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 06:14:05,038 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 508 [2020-10-27 06:14:05,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:14:05,186 INFO L225 Difference]: With dead ends: 101777 [2020-10-27 06:14:05,186 INFO L226 Difference]: Without dead ends: 75215 [2020-10-27 06:14:05,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-10-27 06:14:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75215 states. [2020-10-27 06:14:08,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75215 to 50379. [2020-10-27 06:14:08,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50379 states. [2020-10-27 06:14:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50379 states to 50379 states and 80211 transitions. [2020-10-27 06:14:08,541 INFO L78 Accepts]: Start accepts. Automaton has 50379 states and 80211 transitions. Word has length 508 [2020-10-27 06:14:08,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:14:08,542 INFO L481 AbstractCegarLoop]: Abstraction has 50379 states and 80211 transitions. [2020-10-27 06:14:08,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 06:14:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 50379 states and 80211 transitions. [2020-10-27 06:14:08,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-10-27 06:14:08,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:14:08,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:14:08,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 06:14:08,588 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:14:08,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:14:08,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1841512662, now seen corresponding path program 1 times [2020-10-27 06:14:08,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:14:08,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269051587] [2020-10-27 06:14:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:14:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:14:08,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:08,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:08,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:09,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:09,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:09,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:09,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:09,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:09,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:10,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:10,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:11,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:11,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:11,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:12,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:12,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:12,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:13,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:13,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:13,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:13,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:14:13,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 516 [2020-10-27 06:14:13,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 06:14:13,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5117 [2020-10-27 06:14:13,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:14:13,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:14:13,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:14:13,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 256 [2020-10-27 06:14:13,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:14:15,317 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-27 06:14:15,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:14:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:14:15,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:15,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:14:15,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:14:15,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:14:15,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 06:14:15,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:14:15,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:14:15,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:14:15,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:14:15,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:14:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:14:15,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269051587] [2020-10-27 06:14:15,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:14:15,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:14:15,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117884976] [2020-10-27 06:14:15,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:14:15,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:14:15,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:14:15,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:14:15,776 INFO L87 Difference]: Start difference. First operand 50379 states and 80211 transitions. Second operand 5 states.