/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_lcr.6.ufo.BOUNDED-12.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:25:47,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:25:47,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:25:48,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:25:48,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:25:48,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:25:48,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:25:48,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:25:48,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:25:48,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:25:48,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:25:48,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:25:48,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:25:48,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:25:48,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:25:48,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:25:48,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:25:48,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:25:48,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:25:48,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:25:48,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:25:48,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:25:48,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:25:48,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:25:48,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:25:48,114 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:25:48,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:25:48,117 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:25:48,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:25:48,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:25:48,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:25:48,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:25:48,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:25:48,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:25:48,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:25:48,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:25:48,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:25:48,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:25:48,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:25:48,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:25:48,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:25:48,138 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 05:25:48,186 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:25:48,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:25:48,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:25:48,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:25:48,191 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:25:48,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:25:48,191 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:25:48,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:25:48,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:25:48,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:25:48,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:25:48,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:25:48,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:25:48,194 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:25:48,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:25:48,194 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:25:48,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:25:48,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:25:48,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:25:48,195 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:25:48,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:25:48,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:25:48,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:25:48,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:25:48,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:25:48,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:25:48,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:25:48,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:25:48,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:25:48,198 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:25:48,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:25:48,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:25:48,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:25:48,723 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:25:48,724 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:25:48,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+lhb-reducer.c [2020-10-27 05:25:48,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/caee81a3f/65f7c15a91c848f48c421711eb73be6d/FLAG3094362f0 [2020-10-27 05:25:49,765 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:25:49,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+lhb-reducer.c [2020-10-27 05:25:49,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/caee81a3f/65f7c15a91c848f48c421711eb73be6d/FLAG3094362f0 [2020-10-27 05:25:50,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/caee81a3f/65f7c15a91c848f48c421711eb73be6d [2020-10-27 05:25:50,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:25:50,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:25:50,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:25:50,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:25:50,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:25:50,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:25:50" (1/1) ... [2020-10-27 05:25:50,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e9e3cb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:50, skipping insertion in model container [2020-10-27 05:25:50,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:25:50" (1/1) ... [2020-10-27 05:25:50,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:25:50,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:25:51,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:25:51,782 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:25:52,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:25:52,432 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:25:52,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:52 WrapperNode [2020-10-27 05:25:52,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:25:52,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:25:52,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:25:52,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:25:52,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:52" (1/1) ... [2020-10-27 05:25:52,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:52" (1/1) ... [2020-10-27 05:25:52,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:52" (1/1) ... [2020-10-27 05:25:52,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:52" (1/1) ... [2020-10-27 05:25:52,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:52" (1/1) ... [2020-10-27 05:25:52,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:52" (1/1) ... [2020-10-27 05:25:52,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:52" (1/1) ... [2020-10-27 05:25:52,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:25:52,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:25:52,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:25:52,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:25:52,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:52" (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 05:25:52,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:25:52,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:25:52,786 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:25:52,786 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:25:52,786 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:25:52,786 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:25:52,786 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:25:52,787 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:25:52,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:25:52,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:25:52,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:25:52,787 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:25:52,787 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:25:52,787 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:25:52,788 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:25:52,788 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:25:52,788 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:25:52,788 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:25:52,788 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:25:52,788 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:25:52,789 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 05:25:52,789 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:25:52,789 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:25:52,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:25:52,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:25:52,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:25:52,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:25:52,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:25:52,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:25:52,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:25:59,116 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:25:59,116 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:25:59,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:25:59 BoogieIcfgContainer [2020-10-27 05:25:59,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:25:59,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:25:59,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:25:59,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:25:59,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:25:50" (1/3) ... [2020-10-27 05:25:59,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ec6c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:25:59, skipping insertion in model container [2020-10-27 05:25:59,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:52" (2/3) ... [2020-10-27 05:25:59,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ec6c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:25:59, skipping insertion in model container [2020-10-27 05:25:59,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:25:59" (3/3) ... [2020-10-27 05:25:59,131 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c.v+lhb-reducer.c [2020-10-27 05:25:59,151 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:25:59,172 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:25:59,186 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:25:59,238 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:25:59,238 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:25:59,238 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:25:59,238 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:25:59,238 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:25:59,239 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:25:59,239 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:25:59,239 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:25:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states. [2020-10-27 05:25:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 05:25:59,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:25:59,317 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] [2020-10-27 05:25:59,318 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:25:59,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:25:59,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2046227063, now seen corresponding path program 1 times [2020-10-27 05:25:59,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:25:59,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060197798] [2020-10-27 05:25:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:25:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:00,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:00,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:00,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:00,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:01,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:01,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:02,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:03,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:03,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:03,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:04,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:04,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:04,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 05:26:04,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:26:04,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-27 05:26:04,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:04,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:26:04,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:26:04,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:26:04,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:26:08,409 WARN L193 SmtUtils]: Spent 3.23 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-27 05:26:08,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:26:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:08,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:08,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:08,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:26:08,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:26:08,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-27 05:26:08,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:08,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:26:08,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:26:08,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:26:08,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:08,646 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 05:26:08,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060197798] [2020-10-27 05:26:08,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:26:08,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:26:08,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156066303] [2020-10-27 05:26:08,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:26:08,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:26:08,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:26:08,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:26:08,673 INFO L87 Difference]: Start difference. First operand 1140 states. Second operand 6 states. [2020-10-27 05:26:12,351 WARN L193 SmtUtils]: Spent 3.51 s on a formula simplification that was a NOOP. DAG size: 523 [2020-10-27 05:26:24,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:26:24,609 INFO L93 Difference]: Finished difference Result 1707 states and 3047 transitions. [2020-10-27 05:26:24,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:26:24,614 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-10-27 05:26:24,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:26:24,647 INFO L225 Difference]: With dead ends: 1707 [2020-10-27 05:26:24,647 INFO L226 Difference]: Without dead ends: 952 [2020-10-27 05:26:24,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:26:24,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2020-10-27 05:26:24,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 952. [2020-10-27 05:26:24,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2020-10-27 05:26:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1222 transitions. [2020-10-27 05:26:24,811 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1222 transitions. Word has length 91 [2020-10-27 05:26:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:26:24,814 INFO L481 AbstractCegarLoop]: Abstraction has 952 states and 1222 transitions. [2020-10-27 05:26:24,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:26:24,814 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1222 transitions. [2020-10-27 05:26:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 05:26:24,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:26:24,823 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] [2020-10-27 05:26:24,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:26:24,824 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:26:24,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:26:24,829 INFO L82 PathProgramCache]: Analyzing trace with hash 956990493, now seen corresponding path program 1 times [2020-10-27 05:26:24,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:26:24,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714432412] [2020-10-27 05:26:24,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:26:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:25,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:25,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:25,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:25,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:25,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:25,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:26,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:27,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:28,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:29,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:29,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:29,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:29,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 05:26:29,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:26:29,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 05:26:29,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:29,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:26:29,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:26:29,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:26:29,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:33,728 WARN L193 SmtUtils]: Spent 3.57 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-27 05:26:33,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:26:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:33,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:33,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:33,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:26:33,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:26:33,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-27 05:26:33,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:33,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:26:33,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:26:33,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:26:33,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:26:33,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714432412] [2020-10-27 05:26:33,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:26:33,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:26:33,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938206402] [2020-10-27 05:26:33,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:26:33,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:26:33,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:26:33,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:26:33,901 INFO L87 Difference]: Start difference. First operand 952 states and 1222 transitions. Second operand 6 states. [2020-10-27 05:26:37,685 WARN L193 SmtUtils]: Spent 3.63 s on a formula simplification that was a NOOP. DAG size: 526 [2020-10-27 05:26:48,541 WARN L193 SmtUtils]: Spent 3.55 s on a formula simplification that was a NOOP. DAG size: 524 [2020-10-27 05:26:49,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:26:49,500 INFO L93 Difference]: Finished difference Result 1828 states and 2466 transitions. [2020-10-27 05:26:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:26:49,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 92 [2020-10-27 05:26:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:26:49,509 INFO L225 Difference]: With dead ends: 1828 [2020-10-27 05:26:49,509 INFO L226 Difference]: Without dead ends: 1109 [2020-10-27 05:26:49,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:26:49,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2020-10-27 05:26:49,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1043. [2020-10-27 05:26:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1043 states. [2020-10-27 05:26:49,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1423 transitions. [2020-10-27 05:26:49,600 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1423 transitions. Word has length 92 [2020-10-27 05:26:49,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:26:49,603 INFO L481 AbstractCegarLoop]: Abstraction has 1043 states and 1423 transitions. [2020-10-27 05:26:49,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:26:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1423 transitions. [2020-10-27 05:26:49,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 05:26:49,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:26:49,608 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] [2020-10-27 05:26:49,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:26:49,609 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:26:49,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:26:49,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1835418831, now seen corresponding path program 1 times [2020-10-27 05:26:49,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:26:49,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737674568] [2020-10-27 05:26:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:26:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:49,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:49,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:50,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:50,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:50,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:51,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:51,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:52,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:52,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:52,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:53,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:54,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:54,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:54,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 05:26:54,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:26:54,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-27 05:26:54,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:54,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:26:54,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:26:54,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 05:26:54,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:58,106 WARN L193 SmtUtils]: Spent 3.22 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-27 05:26:58,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:26:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:58,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:58,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:58,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:26:58,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:26:58,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-27 05:26:58,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:58,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:26:58,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:26:58,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:26:58,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:58,242 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 05:26:58,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737674568] [2020-10-27 05:26:58,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:26:58,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:26:58,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911270152] [2020-10-27 05:26:58,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:26:58,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:26:58,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:26:58,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:26:58,245 INFO L87 Difference]: Start difference. First operand 1043 states and 1423 transitions. Second operand 6 states. [2020-10-27 05:27:01,839 WARN L193 SmtUtils]: Spent 3.47 s on a formula simplification that was a NOOP. DAG size: 523 [2020-10-27 05:27:08,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:27:08,657 INFO L93 Difference]: Finished difference Result 1853 states and 2598 transitions. [2020-10-27 05:27:08,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:27:08,658 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-10-27 05:27:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:27:08,670 INFO L225 Difference]: With dead ends: 1853 [2020-10-27 05:27:08,671 INFO L226 Difference]: Without dead ends: 967 [2020-10-27 05:27:08,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:27:08,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2020-10-27 05:27:08,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 967. [2020-10-27 05:27:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 967 states. [2020-10-27 05:27:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1337 transitions. [2020-10-27 05:27:08,727 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1337 transitions. Word has length 93 [2020-10-27 05:27:08,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:27:08,728 INFO L481 AbstractCegarLoop]: Abstraction has 967 states and 1337 transitions. [2020-10-27 05:27:08,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:27:08,728 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1337 transitions. [2020-10-27 05:27:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 05:27:08,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:27:08,731 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] [2020-10-27 05:27:08,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:27:08,731 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:27:08,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:27:08,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2059061533, now seen corresponding path program 1 times [2020-10-27 05:27:08,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:27:08,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334062245] [2020-10-27 05:27:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:27:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:08,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:08,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:09,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:09,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:09,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:09,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:10,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:10,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:11,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:12,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:12,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:13,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:13,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 05:27:13,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:27:13,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 05:27:13,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:13,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:27:13,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:27:13,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:27:13,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:27:17,347 WARN L193 SmtUtils]: Spent 3.35 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-27 05:27:17,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:27:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:17,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:17,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:17,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:27:17,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:27:17,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-27 05:27:17,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:17,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:27:17,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:27:17,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:27:17,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:17,505 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 05:27:17,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334062245] [2020-10-27 05:27:17,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:27:17,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:27:17,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454539924] [2020-10-27 05:27:17,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:27:17,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:27:17,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:27:17,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:27:17,508 INFO L87 Difference]: Start difference. First operand 967 states and 1337 transitions. Second operand 6 states. [2020-10-27 05:27:21,211 WARN L193 SmtUtils]: Spent 3.58 s on a formula simplification that was a NOOP. DAG size: 526 [2020-10-27 05:27:30,337 WARN L193 SmtUtils]: Spent 3.50 s on a formula simplification that was a NOOP. DAG size: 524 [2020-10-27 05:27:31,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:27:31,267 INFO L93 Difference]: Finished difference Result 2280 states and 3236 transitions. [2020-10-27 05:27:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:27:31,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-10-27 05:27:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:27:31,283 INFO L225 Difference]: With dead ends: 2280 [2020-10-27 05:27:31,283 INFO L226 Difference]: Without dead ends: 1420 [2020-10-27 05:27:31,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:27:31,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2020-10-27 05:27:31,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1374. [2020-10-27 05:27:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1374 states. [2020-10-27 05:27:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 1962 transitions. [2020-10-27 05:27:31,374 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 1962 transitions. Word has length 94 [2020-10-27 05:27:31,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:27:31,374 INFO L481 AbstractCegarLoop]: Abstraction has 1374 states and 1962 transitions. [2020-10-27 05:27:31,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:27:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 1962 transitions. [2020-10-27 05:27:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 05:27:31,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:27:31,378 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] [2020-10-27 05:27:31,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:27:31,378 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:27:31,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:27:31,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1012465835, now seen corresponding path program 1 times [2020-10-27 05:27:31,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:27:31,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000856956] [2020-10-27 05:27:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:27:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:31,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:31,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:31,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:31,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:33,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:34,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:34,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:35,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:35,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:35,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:35,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:36,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:36,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:36,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 05:27:36,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:27:36,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 05:27:36,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:36,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:27:36,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:27:36,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 05:27:36,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:40,240 WARN L193 SmtUtils]: Spent 3.25 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-27 05:27:40,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:27:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:40,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:40,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:40,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:27:40,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:27:40,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-27 05:27:40,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:40,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:27:40,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:27:40,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:27:40,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:40,418 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 05:27:40,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000856956] [2020-10-27 05:27:40,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:27:40,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:27:40,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278381896] [2020-10-27 05:27:40,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:27:40,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:27:40,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:27:40,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:27:40,421 INFO L87 Difference]: Start difference. First operand 1374 states and 1962 transitions. Second operand 9 states. [2020-10-27 05:27:43,926 WARN L193 SmtUtils]: Spent 3.37 s on a formula simplification that was a NOOP. DAG size: 520 [2020-10-27 05:27:55,494 WARN L193 SmtUtils]: Spent 3.66 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-27 05:27:59,362 WARN L193 SmtUtils]: Spent 3.54 s on a formula simplification that was a NOOP. DAG size: 525 [2020-10-27 05:28:03,288 WARN L193 SmtUtils]: Spent 3.47 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 05:28:06,791 WARN L193 SmtUtils]: Spent 3.28 s on a formula simplification that was a NOOP. DAG size: 519 [2020-10-27 05:28:09,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:28:09,130 INFO L93 Difference]: Finished difference Result 4978 states and 7271 transitions. [2020-10-27 05:28:09,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:28:09,131 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 95 [2020-10-27 05:28:09,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:28:09,155 INFO L225 Difference]: With dead ends: 4978 [2020-10-27 05:28:09,155 INFO L226 Difference]: Without dead ends: 4539 [2020-10-27 05:28:09,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 0 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2020-10-27 05:28:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4539 states. [2020-10-27 05:28:09,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4539 to 1531. [2020-10-27 05:28:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1531 states. [2020-10-27 05:28:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 2198 transitions. [2020-10-27 05:28:09,326 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 2198 transitions. Word has length 95 [2020-10-27 05:28:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:28:09,327 INFO L481 AbstractCegarLoop]: Abstraction has 1531 states and 2198 transitions. [2020-10-27 05:28:09,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:28:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 2198 transitions. [2020-10-27 05:28:09,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 05:28:09,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:28:09,330 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] [2020-10-27 05:28:09,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:28:09,331 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:28:09,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:28:09,331 INFO L82 PathProgramCache]: Analyzing trace with hash -726276418, now seen corresponding path program 1 times [2020-10-27 05:28:09,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:28:09,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21889461] [2020-10-27 05:28:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:28:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:28:09,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:09,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:09,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:09,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:11,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:12,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:12,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:12,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:13,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:14,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:28:14,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 05:28:14,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:28:14,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 05:28:14,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:28:14,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:28:14,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:28:14,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 05:28:14,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:28:18,171 WARN L193 SmtUtils]: Spent 3.52 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-27 05:28:18,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:28:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:28:18,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:18,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:28:18,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:28:18,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:28:18,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 05:28:18,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:28:18,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:28:18,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:28:18,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:28:18,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:28:18,327 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 05:28:18,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21889461] [2020-10-27 05:28:18,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:28:18,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:28:18,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313673110] [2020-10-27 05:28:18,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:28:18,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:28:18,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:28:18,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:28:18,330 INFO L87 Difference]: Start difference. First operand 1531 states and 2198 transitions. Second operand 9 states. [2020-10-27 05:28:25,388 WARN L193 SmtUtils]: Spent 6.87 s on a formula simplification. DAG size of input: 531 DAG size of output: 527 [2020-10-27 05:28:37,490 WARN L193 SmtUtils]: Spent 7.04 s on a formula simplification. DAG size of input: 529 DAG size of output: 525 [2020-10-27 05:28:42,227 WARN L193 SmtUtils]: Spent 3.54 s on a formula simplification that was a NOOP. DAG size: 527 [2020-10-27 05:28:43,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:28:43,538 INFO L93 Difference]: Finished difference Result 3144 states and 4497 transitions. [2020-10-27 05:28:43,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:28:43,539 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 95 [2020-10-27 05:28:43,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:28:43,550 INFO L225 Difference]: With dead ends: 3144 [2020-10-27 05:28:43,550 INFO L226 Difference]: Without dead ends: 2200 [2020-10-27 05:28:43,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:28:43,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2020-10-27 05:28:43,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1531. [2020-10-27 05:28:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1531 states. [2020-10-27 05:28:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 2196 transitions. [2020-10-27 05:28:43,703 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 2196 transitions. Word has length 95 [2020-10-27 05:28:43,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:28:43,704 INFO L481 AbstractCegarLoop]: Abstraction has 1531 states and 2196 transitions. [2020-10-27 05:28:43,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:28:43,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 2196 transitions. [2020-10-27 05:28:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 05:28:43,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:28:43,707 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] [2020-10-27 05:28:43,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:28:43,708 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:28:43,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:28:43,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1943851682, now seen corresponding path program 1 times [2020-10-27 05:28:43,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:28:43,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937806761] [2020-10-27 05:28:43,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:28:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:28:43,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:43,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:43,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:45,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:45,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:45,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:45,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:46,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:48,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:28:48,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 05:28:48,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:28:48,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 05:28:48,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:28:48,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:28:48,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:28:48,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:28:48,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:28:52,286 WARN L193 SmtUtils]: Spent 3.36 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-27 05:28:52,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:28:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:28:52,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:52,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:28:52,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:28:52,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:28:52,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 05:28:52,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:28:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:28:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:28:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:28:52,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:28:52,394 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 05:28:52,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937806761] [2020-10-27 05:28:52,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:28:52,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:28:52,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668136867] [2020-10-27 05:28:52,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:28:52,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:28:52,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:28:52,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:28:52,396 INFO L87 Difference]: Start difference. First operand 1531 states and 2196 transitions. Second operand 6 states. [2020-10-27 05:28:55,876 WARN L193 SmtUtils]: Spent 3.35 s on a formula simplification that was a NOOP. DAG size: 523 [2020-10-27 05:29:01,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:29:01,642 INFO L93 Difference]: Finished difference Result 2955 states and 4282 transitions. [2020-10-27 05:29:01,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:29:01,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2020-10-27 05:29:01,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:29:01,650 INFO L225 Difference]: With dead ends: 2955 [2020-10-27 05:29:01,651 INFO L226 Difference]: Without dead ends: 1515 [2020-10-27 05:29:01,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:29:01,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2020-10-27 05:29:01,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1515. [2020-10-27 05:29:01,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1515 states. [2020-10-27 05:29:01,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 2172 transitions. [2020-10-27 05:29:01,809 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 2172 transitions. Word has length 95 [2020-10-27 05:29:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:29:01,809 INFO L481 AbstractCegarLoop]: Abstraction has 1515 states and 2172 transitions. [2020-10-27 05:29:01,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:29:01,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 2172 transitions. [2020-10-27 05:29:01,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 05:29:01,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:29:01,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:29:01,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:29:01,818 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:29:01,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:29:01,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1372136172, now seen corresponding path program 1 times [2020-10-27 05:29:01,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:29:01,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331589257] [2020-10-27 05:29:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:29:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:29:01,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:02,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:02,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:02,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:02,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:03,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:05,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:06,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:29:06,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 05:29:06,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:29:06,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 05:29:06,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:29:06,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:29:06,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:29:06,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:29:06,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:29:10,360 WARN L193 SmtUtils]: Spent 3.29 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-27 05:29:10,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:29:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:29:10,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:10,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:29:10,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:29:10,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:29:10,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 05:29:10,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:29:10,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:29:10,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:29:10,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:29:10,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:29:10,474 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 05:29:10,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331589257] [2020-10-27 05:29:10,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:29:10,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:29:10,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138396506] [2020-10-27 05:29:10,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:29:10,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:29:10,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:29:10,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:29:10,476 INFO L87 Difference]: Start difference. First operand 1515 states and 2172 transitions. Second operand 6 states. [2020-10-27 05:29:14,097 WARN L193 SmtUtils]: Spent 3.49 s on a formula simplification that was a NOOP. DAG size: 526 [2020-10-27 05:29:24,521 WARN L193 SmtUtils]: Spent 3.54 s on a formula simplification that was a NOOP. DAG size: 524 [2020-10-27 05:29:25,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:29:25,706 INFO L93 Difference]: Finished difference Result 3699 states and 5371 transitions. [2020-10-27 05:29:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:29:25,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2020-10-27 05:29:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:29:25,716 INFO L225 Difference]: With dead ends: 3699 [2020-10-27 05:29:25,716 INFO L226 Difference]: Without dead ends: 2415 [2020-10-27 05:29:25,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:29:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2020-10-27 05:29:25,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2349. [2020-10-27 05:29:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2020-10-27 05:29:25,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3424 transitions. [2020-10-27 05:29:25,971 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3424 transitions. Word has length 96 [2020-10-27 05:29:25,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:29:25,972 INFO L481 AbstractCegarLoop]: Abstraction has 2349 states and 3424 transitions. [2020-10-27 05:29:25,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:29:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3424 transitions. [2020-10-27 05:29:25,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 05:29:25,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:29:25,976 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] [2020-10-27 05:29:25,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:29:25,976 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:29:25,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:29:25,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1804034470, now seen corresponding path program 1 times [2020-10-27 05:29:25,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:29:25,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819561499] [2020-10-27 05:29:25,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:29:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:29:26,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:26,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:26,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:26,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:27,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:27,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:27,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:27,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:28,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:29,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:31,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:29:31,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 05:29:31,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:29:31,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:29:31,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:29:31,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:29:31,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:29:31,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 05:29:31,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0