/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=DEEPEST --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 [2020-10-28 00:40:24,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:40:24,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:40:25,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:40:25,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:40:25,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:40:25,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:40:25,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:40:25,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:40:25,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:40:25,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:40:25,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:40:25,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:40:25,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:40:25,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:40:25,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:40:25,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:40:25,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:40:25,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:40:25,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:40:25,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:40:25,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:40:25,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:40:25,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:40:25,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:40:25,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:40:25,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:40:25,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:40:25,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:40:25,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:40:25,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:40:25,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:40:25,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:40:25,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:40:25,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:40:25,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:40:25,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:40:25,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:40:25,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:40:25,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:40:25,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:40:25,146 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 [2020-10-28 00:40:25,198 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:40:25,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:40:25,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:40:25,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:40:25,203 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:40:25,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:40:25,203 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:40:25,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:40:25,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:40:25,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:40:25,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:40:25,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:40:25,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:40:25,205 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:40:25,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:40:25,206 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:40:25,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:40:25,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:40:25,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:40:25,207 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:40:25,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:40:25,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:40:25,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:40:25,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:40:25,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:40:25,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:40:25,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:40:25,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:40:25,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:40:25,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:40:25,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:40:25,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:40:25,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:40:25,649 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:40:25,649 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:40:25,650 INFO L432 ainManager$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 [2020-10-28 00:40:25,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1fb2d06ae/b2b3999f340648dc88b6105d2981b187/FLAG28aa9f840 [2020-10-28 00:40:26,734 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:40:26,734 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 [2020-10-28 00:40:26,757 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1fb2d06ae/b2b3999f340648dc88b6105d2981b187/FLAG28aa9f840 [2020-10-28 00:40:27,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1fb2d06ae/b2b3999f340648dc88b6105d2981b187 [2020-10-28 00:40:27,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:40:27,240 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:40:27,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:40:27,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:40:27,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:40:27,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:40:27" (1/1) ... [2020-10-28 00:40:27,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19065848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:27, skipping insertion in model container [2020-10-28 00:40:27,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:40:27" (1/1) ... [2020-10-28 00:40:27,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:40:27,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:40:29,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:40:29,227 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:40:30,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:40:30,276 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:40:30,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:30 WrapperNode [2020-10-28 00:40:30,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:40:30,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:40:30,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:40:30,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:40:30,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:30" (1/1) ... [2020-10-28 00:40:30,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:30" (1/1) ... [2020-10-28 00:40:30,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:30" (1/1) ... [2020-10-28 00:40:30,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:30" (1/1) ... [2020-10-28 00:40:30,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:30" (1/1) ... [2020-10-28 00:40:30,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:30" (1/1) ... [2020-10-28 00:40:30,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:30" (1/1) ... [2020-10-28 00:40:30,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:40:30,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:40:30,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:40:30,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:40:30,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:30" (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 [2020-10-28 00:40:30,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:40:30,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:40:30,588 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:40:30,588 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:40:30,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:40:30,589 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:40:30,589 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:40:30,589 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:40:30,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:40:30,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:40:30,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:40:30,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:40:30,591 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:40:30,591 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:40:30,591 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:40:30,592 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:40:30,593 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:40:30,593 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:40:30,593 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:40:30,593 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:40:30,593 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:40:30,593 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:40:30,594 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:40:30,594 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:40:30,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:40:30,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:40:30,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:40:30,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:40:30,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:40:30,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:40:35,827 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:40:35,827 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:40:35,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:40:35 BoogieIcfgContainer [2020-10-28 00:40:35,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:40:35,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:40:35,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:40:35,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:40:35,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:40:27" (1/3) ... [2020-10-28 00:40:35,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704e956a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:40:35, skipping insertion in model container [2020-10-28 00:40:35,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:30" (2/3) ... [2020-10-28 00:40:35,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704e956a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:40:35, skipping insertion in model container [2020-10-28 00:40:35,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:40:35" (3/3) ... [2020-10-28 00:40:35,842 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 00:40:35,855 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:40:35,862 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:40:35,876 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:40:35,914 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:40:35,914 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:40:35,915 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:40:35,915 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:40:35,915 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:40:35,915 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:40:35,915 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:40:35,915 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:40:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states. [2020-10-28 00:40:36,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-10-28 00:40:36,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:40:36,008 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] [2020-10-28 00:40:36,009 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:40:36,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:40:36,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1245767728, now seen corresponding path program 1 times [2020-10-28 00:40:36,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:40:36,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721703450] [2020-10-28 00:40:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:40:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:38,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:39,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:40,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:41,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:42,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:42,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:42,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:42,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 502 [2020-10-28 00:40:42,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:40:42,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 00:40:42,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:42,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:40:42,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:40:42,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 198 [2020-10-28 00:40:42,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:40:44,709 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 00:40:44,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:40:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:44,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:44,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:44,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:40:44,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:40:44,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 00:40:44,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:44,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:40:44,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:40:44,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:40:44,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:40:45,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721703450] [2020-10-28 00:40:45,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:40:45,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:40:45,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057270701] [2020-10-28 00:40:45,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:40:45,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:40:45,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:40:45,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:40:45,421 INFO L87 Difference]: Start difference. First operand 1510 states. Second operand 5 states. [2020-10-28 00:41:03,444 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-28 00:41:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:41:07,232 INFO L93 Difference]: Finished difference Result 4426 states and 7990 transitions. [2020-10-28 00:41:07,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:41:07,242 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 494 [2020-10-28 00:41:07,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:41:07,292 INFO L225 Difference]: With dead ends: 4426 [2020-10-28 00:41:07,292 INFO L226 Difference]: Without dead ends: 2949 [2020-10-28 00:41:07,308 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 [2020-10-28 00:41:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2020-10-28 00:41:07,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2906. [2020-10-28 00:41:07,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2906 states. [2020-10-28 00:41:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 4770 transitions. [2020-10-28 00:41:07,585 INFO L78 Accepts]: Start accepts. Automaton has 2906 states and 4770 transitions. Word has length 494 [2020-10-28 00:41:07,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:41:07,587 INFO L481 AbstractCegarLoop]: Abstraction has 2906 states and 4770 transitions. [2020-10-28 00:41:07,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:41:07,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2906 states and 4770 transitions. [2020-10-28 00:41:07,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-10-28 00:41:07,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:41:07,603 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] [2020-10-28 00:41:07,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:41:07,604 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:41:07,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:41:07,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1808489233, now seen corresponding path program 1 times [2020-10-28 00:41:07,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:41:07,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435570917] [2020-10-28 00:41:07,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:41:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:07,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:08,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:08,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:09,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:10,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:10,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:10,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:11,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:11,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:11,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:12,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:12,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:12,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 504 [2020-10-28 00:41:12,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:41:12,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-28 00:41:12,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:12,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:41:12,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:41:12,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-28 00:41:12,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:14,551 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 00:41:14,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:41:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:14,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:14,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:14,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:41:14,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:41:14,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 00:41:14,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:14,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:41:14,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:41:14,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:41:14,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:41:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:41:15,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435570917] [2020-10-28 00:41:15,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:41:15,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:41:15,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515422358] [2020-10-28 00:41:15,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:41:15,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:41:15,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:41:15,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:41:15,363 INFO L87 Difference]: Start difference. First operand 2906 states and 4770 transitions. Second operand 4 states. [2020-10-28 00:41:36,085 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 435 [2020-10-28 00:41:39,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:41:39,540 INFO L93 Difference]: Finished difference Result 8373 states and 13692 transitions. [2020-10-28 00:41:39,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:41:39,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-10-28 00:41:39,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:41:39,576 INFO L225 Difference]: With dead ends: 8373 [2020-10-28 00:41:39,577 INFO L226 Difference]: Without dead ends: 5679 [2020-10-28 00:41:39,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:41:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5679 states. [2020-10-28 00:41:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5679 to 5633. [2020-10-28 00:41:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5633 states. [2020-10-28 00:41:39,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5633 states to 5633 states and 9208 transitions. [2020-10-28 00:41:39,817 INFO L78 Accepts]: Start accepts. Automaton has 5633 states and 9208 transitions. Word has length 496 [2020-10-28 00:41:39,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:41:39,818 INFO L481 AbstractCegarLoop]: Abstraction has 5633 states and 9208 transitions. [2020-10-28 00:41:39,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:41:39,818 INFO L276 IsEmpty]: Start isEmpty. Operand 5633 states and 9208 transitions. [2020-10-28 00:41:39,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-10-28 00:41:39,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:41:39,841 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] [2020-10-28 00:41:39,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:41:39,841 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:41:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:41:39,842 INFO L82 PathProgramCache]: Analyzing trace with hash -517208623, now seen corresponding path program 1 times [2020-10-28 00:41:39,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:41:39,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226182926] [2020-10-28 00:41:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:41:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:39,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:40,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:40,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:40,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:41,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:41,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:42,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:42,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:42,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:43,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:43,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:43,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:44,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:45,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:45,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 505 [2020-10-28 00:41:45,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:41:45,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5186 [2020-10-28 00:41:45,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:45,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:41:45,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 00:41:45,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-28 00:41:45,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:46,561 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 00:41:46,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:41:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:46,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:46,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:46,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:41:46,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:41:46,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 00:41:46,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:41:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:41:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:41:46,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:41:47,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226182926] [2020-10-28 00:41:47,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:41:47,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:41:47,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084602934] [2020-10-28 00:41:47,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:41:47,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:41:47,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:41:47,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:41:47,048 INFO L87 Difference]: Start difference. First operand 5633 states and 9208 transitions. Second operand 4 states. [2020-10-28 00:42:07,066 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 435 [2020-10-28 00:42:10,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:42:10,498 INFO L93 Difference]: Finished difference Result 16544 states and 26997 transitions. [2020-10-28 00:42:10,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:42:10,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-10-28 00:42:10,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:42:10,555 INFO L225 Difference]: With dead ends: 16544 [2020-10-28 00:42:10,556 INFO L226 Difference]: Without dead ends: 11129 [2020-10-28 00:42:10,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:42:10,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11129 states. [2020-10-28 00:42:11,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11129 to 11088. [2020-10-28 00:42:11,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11088 states. [2020-10-28 00:42:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11088 states to 11088 states and 18065 transitions. [2020-10-28 00:42:11,193 INFO L78 Accepts]: Start accepts. Automaton has 11088 states and 18065 transitions. Word has length 497 [2020-10-28 00:42:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:42:11,194 INFO L481 AbstractCegarLoop]: Abstraction has 11088 states and 18065 transitions. [2020-10-28 00:42:11,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:42:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 11088 states and 18065 transitions. [2020-10-28 00:42:11,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-10-28 00:42:11,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:42:11,227 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] [2020-10-28 00:42:11,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:42:11,235 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:42:11,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:42:11,237 INFO L82 PathProgramCache]: Analyzing trace with hash -819090090, now seen corresponding path program 1 times [2020-10-28 00:42:11,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:42:11,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031819112] [2020-10-28 00:42:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:42:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:11,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:11,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:11,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:11,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:12,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:12,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:12,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:13,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:14,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:14,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:14,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:15,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:15,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:15,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:16,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:16,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 505 [2020-10-28 00:42:16,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:42:16,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-28 00:42:16,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:16,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:42:16,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 00:42:16,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 00:42:16,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:42:17,816 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 00:42:17,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:42:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:17,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:17,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:17,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:42:17,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:42:17,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-28 00:42:17,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:17,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:42:17,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:42:17,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:42:17,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:42:18,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031819112] [2020-10-28 00:42:18,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:42:18,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:42:18,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978192438] [2020-10-28 00:42:18,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:42:18,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:42:18,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:42:18,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:42:18,218 INFO L87 Difference]: Start difference. First operand 11088 states and 18065 transitions. Second operand 4 states. [2020-10-28 00:42:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:42:40,795 INFO L93 Difference]: Finished difference Result 32972 states and 53665 transitions. [2020-10-28 00:42:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:42:40,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-10-28 00:42:40,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:42:40,869 INFO L225 Difference]: With dead ends: 32972 [2020-10-28 00:42:40,869 INFO L226 Difference]: Without dead ends: 22024 [2020-10-28 00:42:40,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:42:40,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22024 states. [2020-10-28 00:42:41,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22024 to 11164. [2020-10-28 00:42:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11164 states. [2020-10-28 00:42:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11164 states to 11164 states and 18176 transitions. [2020-10-28 00:42:41,462 INFO L78 Accepts]: Start accepts. Automaton has 11164 states and 18176 transitions. Word has length 497 [2020-10-28 00:42:41,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:42:41,462 INFO L481 AbstractCegarLoop]: Abstraction has 11164 states and 18176 transitions. [2020-10-28 00:42:41,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:42:41,462 INFO L276 IsEmpty]: Start isEmpty. Operand 11164 states and 18176 transitions. [2020-10-28 00:42:41,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-10-28 00:42:41,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:42:41,496 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] [2020-10-28 00:42:41,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:42:41,496 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:42:41,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:42:41,497 INFO L82 PathProgramCache]: Analyzing trace with hash 61377811, now seen corresponding path program 1 times [2020-10-28 00:42:41,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:42:41,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648217571] [2020-10-28 00:42:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:42:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:41,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:41,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:41,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:42,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:42,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:42,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:42,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:43,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:43,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:43,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:44,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:44,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:45,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:45,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:45,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:46,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:46,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 506 [2020-10-28 00:42:46,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:42:46,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-28 00:42:46,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:42:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 00:42:46,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-28 00:42:46,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:48,146 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 00:42:48,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:42:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:48,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:48,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:48,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:42:48,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:42:48,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:42:48,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:48,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:42:48,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:42:48,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:42:48,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:42:48,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648217571] [2020-10-28 00:42:48,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:42:48,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:42:48,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587703158] [2020-10-28 00:42:48,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:42:48,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:42:48,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:42:48,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:42:48,486 INFO L87 Difference]: Start difference. First operand 11164 states and 18176 transitions. Second operand 4 states. [2020-10-28 00:43:09,267 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 435 [2020-10-28 00:43:12,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:43:12,794 INFO L93 Difference]: Finished difference Result 32380 states and 52562 transitions. [2020-10-28 00:43:12,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:43:12,795 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-10-28 00:43:12,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:43:12,842 INFO L225 Difference]: With dead ends: 32380 [2020-10-28 00:43:12,843 INFO L226 Difference]: Without dead ends: 21889 [2020-10-28 00:43:12,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:43:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21889 states. [2020-10-28 00:43:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21889 to 21850. [2020-10-28 00:43:13,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21850 states. [2020-10-28 00:43:13,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21850 states to 21850 states and 35419 transitions. [2020-10-28 00:43:13,860 INFO L78 Accepts]: Start accepts. Automaton has 21850 states and 35419 transitions. Word has length 498 [2020-10-28 00:43:13,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:43:13,860 INFO L481 AbstractCegarLoop]: Abstraction has 21850 states and 35419 transitions. [2020-10-28 00:43:13,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:43:13,860 INFO L276 IsEmpty]: Start isEmpty. Operand 21850 states and 35419 transitions. [2020-10-28 00:43:13,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-10-28 00:43:13,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:43:13,907 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] [2020-10-28 00:43:13,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:43:13,907 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:43:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:43:13,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1384691696, now seen corresponding path program 1 times [2020-10-28 00:43:13,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:43:13,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450243142] [2020-10-28 00:43:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:43:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:43:13,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:14,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:14,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:14,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:15,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:15,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:15,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:15,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:16,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:16,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:16,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:17,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:17,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:17,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:17,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:17,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:18,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:18,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:19,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:43:19,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 506 [2020-10-28 00:43:19,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 00:43:19,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-28 00:43:19,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:43:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:43:19,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 00:43:19,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 00:43:19,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:43:20,500 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 00:43:20,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:43:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:43:20,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:20,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:43:20,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:43:20,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:43:20,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 00:43:20,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:43:20,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:43:20,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:43:20,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:43:20,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:43:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:43:20,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450243142] [2020-10-28 00:43:20,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:43:20,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:43:20,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537932651] [2020-10-28 00:43:20,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:43:20,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:43:20,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:43:20,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:43:20,803 INFO L87 Difference]: Start difference. First operand 21850 states and 35419 transitions. Second operand 5 states. [2020-10-28 00:43:51,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:43:51,329 INFO L93 Difference]: Finished difference Result 78941 states and 126803 transitions. [2020-10-28 00:43:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:43:51,330 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 498 [2020-10-28 00:43:51,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:43:51,445 INFO L225 Difference]: With dead ends: 78941 [2020-10-28 00:43:51,445 INFO L226 Difference]: Without dead ends: 59545 [2020-10-28 00:43:51,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:43:51,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59545 states. [2020-10-28 00:43:52,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59545 to 23527. [2020-10-28 00:43:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23527 states. [2020-10-28 00:43:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23527 states to 23527 states and 38417 transitions. [2020-10-28 00:43:52,950 INFO L78 Accepts]: Start accepts. Automaton has 23527 states and 38417 transitions. Word has length 498 [2020-10-28 00:43:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:43:52,951 INFO L481 AbstractCegarLoop]: Abstraction has 23527 states and 38417 transitions. [2020-10-28 00:43:52,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:43:52,951 INFO L276 IsEmpty]: Start isEmpty. Operand 23527 states and 38417 transitions. [2020-10-28 00:43:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-10-28 00:43:52,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:43:52,986 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] [2020-10-28 00:43:52,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:43:52,987 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:43:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:43:52,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1573385341, now seen corresponding path program 1 times [2020-10-28 00:43:52,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:43:52,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990213116] [2020-10-28 00:43:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:43:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:43:53,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:53,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:54,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:54,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:55,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:55,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:55,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:55,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:56,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:56,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:56,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:56,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:57,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:57,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:58,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:43:58,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 508 [2020-10-28 00:43:58,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:43:58,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:43:58,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:43:58,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:43:58,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 193 [2020-10-28 00:43:58,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 00:43:58,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:43:59,587 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 00:43:59,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:43:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:43:59,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:59,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:43:59,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:43:59,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:43:59,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 00:43:59,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:43:59,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:43:59,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:43:59,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:43:59,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:43:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:43:59,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990213116] [2020-10-28 00:43:59,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:43:59,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:43:59,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635832225] [2020-10-28 00:43:59,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:43:59,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:43:59,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:43:59,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:43:59,786 INFO L87 Difference]: Start difference. First operand 23527 states and 38417 transitions. Second operand 4 states.