/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_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:29:33,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:29:33,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:29:33,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:29:33,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:29:33,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:29:33,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:29:33,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:29:33,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:29:33,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:29:33,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:29:33,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:29:33,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:29:33,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:29:33,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:29:33,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:29:33,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:29:33,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:29:33,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:29:33,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:29:33,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:29:33,793 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:29:33,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:29:33,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:29:33,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:29:33,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:29:33,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:29:33,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:29:33,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:29:33,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:29:33,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:29:33,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:29:33,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:29:33,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:29:33,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:29:33,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:29:33,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:29:33,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:29:33,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:29:33,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:29:33,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:29:33,830 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 23:29:33,878 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:29:33,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:29:33,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:29:33,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:29:33,880 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:29:33,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:29:33,881 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:29:33,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:29:33,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:29:33,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:29:33,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:29:33,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:29:33,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:29:33,883 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:29:33,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:29:33,884 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:29:33,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:29:33,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:29:33,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:29:33,885 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:29:33,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:29:33,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:29:33,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:29:33,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:29:33,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:29:33,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:29:33,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:29:33,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:29:33,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:29:33,888 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:29:34,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:29:34,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:29:34,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:29:34,296 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:29:34,297 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:29:34,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:29:34,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d8a95206/69bb4a1886f74e889e8dd1a3d9a4a718/FLAGc70847d11 [2020-10-27 23:29:35,199 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:29:35,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:29:35,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d8a95206/69bb4a1886f74e889e8dd1a3d9a4a718/FLAGc70847d11 [2020-10-27 23:29:35,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d8a95206/69bb4a1886f74e889e8dd1a3d9a4a718 [2020-10-27 23:29:35,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:29:35,427 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:29:35,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:29:35,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:29:35,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:29:35,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:29:35" (1/1) ... [2020-10-27 23:29:35,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c8f5d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:29:35, skipping insertion in model container [2020-10-27 23:29:35,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:29:35" (1/1) ... [2020-10-27 23:29:35,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:29:35,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:29:36,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:29:36,532 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:29:36,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:29:36,917 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:29:36,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:29:36 WrapperNode [2020-10-27 23:29:36,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:29:36,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:29:36,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:29:36,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:29:36,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:29:36" (1/1) ... [2020-10-27 23:29:36,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:29:36" (1/1) ... [2020-10-27 23:29:36,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:29:36" (1/1) ... [2020-10-27 23:29:36,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:29:36" (1/1) ... [2020-10-27 23:29:37,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:29:36" (1/1) ... [2020-10-27 23:29:37,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:29:36" (1/1) ... [2020-10-27 23:29:37,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:29:36" (1/1) ... [2020-10-27 23:29:37,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:29:37,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:29:37,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:29:37,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:29:37,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:29:36" (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 23:29:37,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:29:37,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:29:37,232 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:29:37,232 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:29:37,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:29:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:29:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:29:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:29:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:29:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:29:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:29:37,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:29:37,234 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:29:37,234 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:29:37,234 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:29:37,234 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:29:37,234 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:29:37,235 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:29:37,235 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:29:37,235 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:29:37,235 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:29:37,235 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:29:37,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:29:37,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:29:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:29:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:29:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:29:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:29:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:29:40,646 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:29:40,647 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:29:40,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:29:40 BoogieIcfgContainer [2020-10-27 23:29:40,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:29:40,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:29:40,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:29:40,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:29:40,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:29:35" (1/3) ... [2020-10-27 23:29:40,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e065ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:29:40, skipping insertion in model container [2020-10-27 23:29:40,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:29:36" (2/3) ... [2020-10-27 23:29:40,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e065ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:29:40, skipping insertion in model container [2020-10-27 23:29:40,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:29:40" (3/3) ... [2020-10-27 23:29:40,660 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:29:40,673 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:29:40,680 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:29:40,696 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:29:40,733 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:29:40,733 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:29:40,733 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:29:40,734 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:29:40,734 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:29:40,734 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:29:40,734 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:29:40,734 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:29:40,770 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states. [2020-10-27 23:29:40,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-27 23:29:40,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:29:40,797 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] [2020-10-27 23:29:40,797 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:29:40,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:29:40,807 INFO L82 PathProgramCache]: Analyzing trace with hash -650766214, now seen corresponding path program 1 times [2020-10-27 23:29:40,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:29:40,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415975536] [2020-10-27 23:29:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:29:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:42,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:42,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:43,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:43,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:44,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:44,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:44,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:44,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:45,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:45,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:45,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:45,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:46,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:46,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:46,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:46,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:46,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-27 23:29:46,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:29:46,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-27 23:29:46,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:46,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:29:46,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:29:46,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 23:29:46,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:29:48,465 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:29:48,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:29:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:48,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:48,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:48,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:29:48,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:29:48,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 23:29:48,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:48,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:29:48,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:29:48,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:29:48,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:48,745 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 23:29:48,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415975536] [2020-10-27 23:29:48,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:29:48,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:29:48,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180318141] [2020-10-27 23:29:48,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:29:48,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:29:48,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:29:48,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:29:48,782 INFO L87 Difference]: Start difference. First operand 729 states. Second operand 5 states. [2020-10-27 23:29:58,902 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 23:30:01,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:30:01,147 INFO L93 Difference]: Finished difference Result 2099 states and 3725 transitions. [2020-10-27 23:30:01,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:30:01,150 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 303 [2020-10-27 23:30:01,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:30:01,193 INFO L225 Difference]: With dead ends: 2099 [2020-10-27 23:30:01,193 INFO L226 Difference]: Without dead ends: 1407 [2020-10-27 23:30:01,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:30:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2020-10-27 23:30:01,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1404. [2020-10-27 23:30:01,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1404 states. [2020-10-27 23:30:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2174 transitions. [2020-10-27 23:30:01,388 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2174 transitions. Word has length 303 [2020-10-27 23:30:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:30:01,389 INFO L481 AbstractCegarLoop]: Abstraction has 1404 states and 2174 transitions. [2020-10-27 23:30:01,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:30:01,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2174 transitions. [2020-10-27 23:30:01,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-27 23:30:01,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:30:01,398 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] [2020-10-27 23:30:01,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:30:01,399 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:30:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:30:01,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1859323799, now seen corresponding path program 1 times [2020-10-27 23:30:01,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:30:01,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580813606] [2020-10-27 23:30:01,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:30:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:01,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:01,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:02,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:02,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:02,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:02,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:03,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:03,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:03,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:03,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:03,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:03,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:03,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:04,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:06,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:06,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-27 23:30:06,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:30:06,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 23:30:06,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:06,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:30:06,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:30:06,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 23:30:06,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:07,790 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:30:07,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:30:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:07,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:07,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:07,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:30:07,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:30:07,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 23:30:07,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:07,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:30:07,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:30:07,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:30:07,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:07,982 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 23:30:07,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580813606] [2020-10-27 23:30:07,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:30:07,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:30:07,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996490123] [2020-10-27 23:30:07,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:30:07,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:30:07,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:30:07,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:30:07,986 INFO L87 Difference]: Start difference. First operand 1404 states and 2174 transitions. Second operand 4 states. [2020-10-27 23:30:17,111 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 300 [2020-10-27 23:30:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:30:19,350 INFO L93 Difference]: Finished difference Result 3956 states and 6079 transitions. [2020-10-27 23:30:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:30:19,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 305 [2020-10-27 23:30:19,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:30:19,367 INFO L225 Difference]: With dead ends: 3956 [2020-10-27 23:30:19,367 INFO L226 Difference]: Without dead ends: 2673 [2020-10-27 23:30:19,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:30:19,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2020-10-27 23:30:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2670. [2020-10-27 23:30:19,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2670 states. [2020-10-27 23:30:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2670 states to 2670 states and 4094 transitions. [2020-10-27 23:30:19,501 INFO L78 Accepts]: Start accepts. Automaton has 2670 states and 4094 transitions. Word has length 305 [2020-10-27 23:30:19,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:30:19,501 INFO L481 AbstractCegarLoop]: Abstraction has 2670 states and 4094 transitions. [2020-10-27 23:30:19,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:30:19,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2670 states and 4094 transitions. [2020-10-27 23:30:19,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-27 23:30:19,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:30:19,511 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] [2020-10-27 23:30:19,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:30:19,511 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:30:19,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:30:19,512 INFO L82 PathProgramCache]: Analyzing trace with hash 479596292, now seen corresponding path program 1 times [2020-10-27 23:30:19,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:30:19,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692160518] [2020-10-27 23:30:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:30:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:19,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:19,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:19,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:20,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:20,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:20,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:20,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:20,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:20,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:20,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:20,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:21,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:21,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:21,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:24,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:24,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-27 23:30:24,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:30:24,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:30:24,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:24,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:30:24,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:30:24,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:30:24,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:25,885 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:30:25,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:30:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:25,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:25,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:25,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:30:25,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:30:25,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 23:30:25,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:25,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:30:25,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:30:25,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:30:25,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:26,083 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 23:30:26,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692160518] [2020-10-27 23:30:26,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:30:26,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:30:26,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746970502] [2020-10-27 23:30:26,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:30:26,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:30:26,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:30:26,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:30:26,092 INFO L87 Difference]: Start difference. First operand 2670 states and 4094 transitions. Second operand 4 states. [2020-10-27 23:30:36,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:30:36,235 INFO L93 Difference]: Finished difference Result 7790 states and 11898 transitions. [2020-10-27 23:30:36,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 23:30:36,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 305 [2020-10-27 23:30:36,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:30:36,262 INFO L225 Difference]: With dead ends: 7790 [2020-10-27 23:30:36,263 INFO L226 Difference]: Without dead ends: 5232 [2020-10-27 23:30:36,269 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 [2020-10-27 23:30:36,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5232 states. [2020-10-27 23:30:36,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5232 to 2683. [2020-10-27 23:30:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2683 states. [2020-10-27 23:30:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 4110 transitions. [2020-10-27 23:30:36,428 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 4110 transitions. Word has length 305 [2020-10-27 23:30:36,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:30:36,428 INFO L481 AbstractCegarLoop]: Abstraction has 2683 states and 4110 transitions. [2020-10-27 23:30:36,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:30:36,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 4110 transitions. [2020-10-27 23:30:36,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-10-27 23:30:36,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:30:36,437 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] [2020-10-27 23:30:36,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:30:36,438 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:30:36,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:30:36,439 INFO L82 PathProgramCache]: Analyzing trace with hash 285808424, now seen corresponding path program 1 times [2020-10-27 23:30:36,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:30:36,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593575764] [2020-10-27 23:30:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:30:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:36,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:36,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:36,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:36,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:36,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:37,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:37,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:37,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:37,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:37,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:37,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:37,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:37,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:38,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:39,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:39,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:41,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:41,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 314 [2020-10-27 23:30:41,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:30:41,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-27 23:30:41,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:41,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:30:41,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 23:30:41,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 23:30:41,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:42,924 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:30:42,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:30:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:42,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:42,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:42,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:30:42,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:30:42,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 23:30:42,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:42,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:30:42,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:30:42,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:30:42,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:43,097 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 23:30:43,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593575764] [2020-10-27 23:30:43,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:30:43,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:30:43,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036269962] [2020-10-27 23:30:43,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:30:43,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:30:43,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:30:43,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:30:43,099 INFO L87 Difference]: Start difference. First operand 2683 states and 4110 transitions. Second operand 4 states. [2020-10-27 23:30:52,700 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 300 [2020-10-27 23:30:54,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:30:54,974 INFO L93 Difference]: Finished difference Result 7787 states and 11893 transitions. [2020-10-27 23:30:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:30:54,975 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 306 [2020-10-27 23:30:54,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:30:55,001 INFO L225 Difference]: With dead ends: 7787 [2020-10-27 23:30:55,002 INFO L226 Difference]: Without dead ends: 5242 [2020-10-27 23:30:55,008 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 [2020-10-27 23:30:55,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2020-10-27 23:30:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 5239. [2020-10-27 23:30:55,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5239 states. [2020-10-27 23:30:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5239 states to 5239 states and 7974 transitions. [2020-10-27 23:30:55,321 INFO L78 Accepts]: Start accepts. Automaton has 5239 states and 7974 transitions. Word has length 306 [2020-10-27 23:30:55,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:30:55,322 INFO L481 AbstractCegarLoop]: Abstraction has 5239 states and 7974 transitions. [2020-10-27 23:30:55,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:30:55,322 INFO L276 IsEmpty]: Start isEmpty. Operand 5239 states and 7974 transitions. [2020-10-27 23:30:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-10-27 23:30:55,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:30:55,337 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] [2020-10-27 23:30:55,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:30:55,337 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:30:55,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:30:55,338 INFO L82 PathProgramCache]: Analyzing trace with hash -877794965, now seen corresponding path program 1 times [2020-10-27 23:30:55,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:30:55,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875696445] [2020-10-27 23:30:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:30:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:55,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:55,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:55,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:56,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:56,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:56,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:56,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:56,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:56,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:56,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:57,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:57,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:57,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:57,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:58,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:58,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:58,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:00,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:00,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 314 [2020-10-27 23:31:00,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 23:31:00,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 23:31:00,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:00,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:31:00,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 23:31:00,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:31:00,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:31:01,763 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:31:01,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:31:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:01,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:01,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:01,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:31:01,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:31:01,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 23:31:01,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:01,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:31:01,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:31:01,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:31:01,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:31:01,905 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 23:31:01,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875696445] [2020-10-27 23:31:01,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:31:01,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:31:01,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250749809] [2020-10-27 23:31:01,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:31:01,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:31:01,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:31:01,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:31:01,907 INFO L87 Difference]: Start difference. First operand 5239 states and 7974 transitions. Second operand 5 states. [2020-10-27 23:31:10,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:31:10,282 INFO L93 Difference]: Finished difference Result 14208 states and 21414 transitions. [2020-10-27 23:31:10,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:31:10,283 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 306 [2020-10-27 23:31:10,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:31:10,319 INFO L225 Difference]: With dead ends: 14208 [2020-10-27 23:31:10,319 INFO L226 Difference]: Without dead ends: 9621 [2020-10-27 23:31:10,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:31:10,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9621 states. [2020-10-27 23:31:10,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9621 to 5684. [2020-10-27 23:31:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5684 states. [2020-10-27 23:31:10,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5684 states to 5684 states and 8746 transitions. [2020-10-27 23:31:10,692 INFO L78 Accepts]: Start accepts. Automaton has 5684 states and 8746 transitions. Word has length 306 [2020-10-27 23:31:10,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:31:10,693 INFO L481 AbstractCegarLoop]: Abstraction has 5684 states and 8746 transitions. [2020-10-27 23:31:10,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:31:10,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5684 states and 8746 transitions. [2020-10-27 23:31:10,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-27 23:31:10,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:31:10,708 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] [2020-10-27 23:31:10,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:31:10,709 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:31:10,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:31:10,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1213758119, now seen corresponding path program 1 times [2020-10-27 23:31:10,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:31:10,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157220728] [2020-10-27 23:31:10,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:31:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:10,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:10,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:10,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:11,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:11,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:11,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:11,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:11,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:11,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:11,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:11,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:12,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:12,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:12,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:15,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:15,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:15,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:15,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-27 23:31:15,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:31:15,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 23:31:15,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:15,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:31:15,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 23:31:15,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:31:15,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:31:17,049 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:31:17,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:31:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:17,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:17,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:17,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:31:17,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:31:17,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:31:17,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:17,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:31:17,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:31:17,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:31:17,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:31:17,133 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 23:31:17,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157220728] [2020-10-27 23:31:17,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:31:17,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:31:17,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307985016] [2020-10-27 23:31:17,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:31:17,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:31:17,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:31:17,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:31:17,136 INFO L87 Difference]: Start difference. First operand 5684 states and 8746 transitions. Second operand 4 states. [2020-10-27 23:31:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:31:27,047 INFO L93 Difference]: Finished difference Result 14818 states and 22292 transitions. [2020-10-27 23:31:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 23:31:27,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 308 [2020-10-27 23:31:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:31:27,073 INFO L225 Difference]: With dead ends: 14818 [2020-10-27 23:31:27,073 INFO L226 Difference]: Without dead ends: 10254 [2020-10-27 23:31:27,084 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 [2020-10-27 23:31:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10254 states. [2020-10-27 23:31:27,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10254 to 5789. [2020-10-27 23:31:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5789 states. [2020-10-27 23:31:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5789 states to 5789 states and 8880 transitions. [2020-10-27 23:31:27,472 INFO L78 Accepts]: Start accepts. Automaton has 5789 states and 8880 transitions. Word has length 308 [2020-10-27 23:31:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:31:27,472 INFO L481 AbstractCegarLoop]: Abstraction has 5789 states and 8880 transitions. [2020-10-27 23:31:27,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:31:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 5789 states and 8880 transitions. [2020-10-27 23:31:27,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-27 23:31:27,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:31:27,487 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] [2020-10-27 23:31:27,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:31:27,487 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:31:27,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:31:27,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1078960306, now seen corresponding path program 1 times [2020-10-27 23:31:27,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:31:27,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459876554] [2020-10-27 23:31:27,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:31:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:27,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:27,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:27,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:27,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:28,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:28,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:28,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:28,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:28,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:28,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:28,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:28,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:28,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:29,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:29,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:29,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:31,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:32,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:32,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-27 23:31:32,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 23:31:32,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-27 23:31:32,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:32,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:31:32,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 23:31:32,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 23:31:32,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:31:33,847 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:31:33,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:31:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:33,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:33,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:33,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:31:33,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:31:33,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:31:33,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:33,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:31:33,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:31:33,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:31:33,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:31:33,936 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 23:31:33,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459876554] [2020-10-27 23:31:33,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:31:33,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:31:33,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774275050] [2020-10-27 23:31:33,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:31:33,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:31:33,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:31:33,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:31:33,939 INFO L87 Difference]: Start difference. First operand 5789 states and 8880 transitions. Second operand 4 states. [2020-10-27 23:31:40,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:31:40,091 INFO L93 Difference]: Finished difference Result 15026 states and 22561 transitions. [2020-10-27 23:31:40,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 23:31:40,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 309 [2020-10-27 23:31:40,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:31:40,114 INFO L225 Difference]: With dead ends: 15026 [2020-10-27 23:31:40,115 INFO L226 Difference]: Without dead ends: 10417 [2020-10-27 23:31:40,126 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 [2020-10-27 23:31:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10417 states. [2020-10-27 23:31:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10417 to 5930. [2020-10-27 23:31:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5930 states. [2020-10-27 23:31:40,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5930 states to 5930 states and 9053 transitions. [2020-10-27 23:31:40,579 INFO L78 Accepts]: Start accepts. Automaton has 5930 states and 9053 transitions. Word has length 309 [2020-10-27 23:31:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:31:40,579 INFO L481 AbstractCegarLoop]: Abstraction has 5930 states and 9053 transitions. [2020-10-27 23:31:40,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:31:40,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5930 states and 9053 transitions. [2020-10-27 23:31:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-27 23:31:40,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:31:40,604 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] [2020-10-27 23:31:40,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:31:40,605 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:31:40,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:31:40,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1508350694, now seen corresponding path program 1 times [2020-10-27 23:31:40,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:31:40,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099297530] [2020-10-27 23:31:40,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:31:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:40,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:40,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:40,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:41,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:41,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:41,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:41,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:41,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:41,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:41,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:41,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:41,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:41,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:41,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:42,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:42,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:44,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:45,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:45,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-27 23:31:45,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 23:31:45,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:31:45,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:31:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:31:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 23:31:45,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:31:46,912 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:31:46,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:31:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:46,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:46,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:46,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:31:46,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:31:46,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:31:46,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:46,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:31:46,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:31:46,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:31:46,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:31:47,000 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 23:31:47,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099297530] [2020-10-27 23:31:47,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:31:47,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:31:47,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962297495] [2020-10-27 23:31:47,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:31:47,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:31:47,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:31:47,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:31:47,003 INFO L87 Difference]: Start difference. First operand 5930 states and 9053 transitions. Second operand 4 states. [2020-10-27 23:31:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:31:53,198 INFO L93 Difference]: Finished difference Result 17334 states and 26380 transitions. [2020-10-27 23:31:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 23:31:53,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 310 [2020-10-27 23:31:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:31:53,220 INFO L225 Difference]: With dead ends: 17334 [2020-10-27 23:31:53,221 INFO L226 Difference]: Without dead ends: 11574 [2020-10-27 23:31:53,233 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 [2020-10-27 23:31:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11574 states. [2020-10-27 23:31:53,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11574 to 5961. [2020-10-27 23:31:53,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5961 states. [2020-10-27 23:31:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5961 states to 5961 states and 9091 transitions. [2020-10-27 23:31:53,711 INFO L78 Accepts]: Start accepts. Automaton has 5961 states and 9091 transitions. Word has length 310 [2020-10-27 23:31:53,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:31:53,711 INFO L481 AbstractCegarLoop]: Abstraction has 5961 states and 9091 transitions. [2020-10-27 23:31:53,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:31:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 5961 states and 9091 transitions. [2020-10-27 23:31:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-27 23:31:53,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:31:53,724 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] [2020-10-27 23:31:53,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:31:53,724 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:31:53,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:31:53,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2089388620, now seen corresponding path program 1 times [2020-10-27 23:31:53,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:31:53,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268637853] [2020-10-27 23:31:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:31:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:53,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:54,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:54,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:54,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:54,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:54,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:54,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:54,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:54,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:54,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:54,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:54,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:54,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:54,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:55,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:55,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:56,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:56,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:56,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:58,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:58,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-27 23:31:58,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 23:31:58,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 23:31:58,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:58,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:31:58,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:31:58,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 23:31:58,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:32:00,313 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:32:00,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:32:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:00,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:00,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:00,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:32:00,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:32:00,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:32:00,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:00,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:32:00,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:32:00,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:32:00,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:32:00,463 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 23:32:00,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268637853] [2020-10-27 23:32:00,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:32:00,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:32:00,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651583511] [2020-10-27 23:32:00,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:32:00,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:32:00,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:32:00,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:32:00,465 INFO L87 Difference]: Start difference. First operand 5961 states and 9091 transitions. Second operand 5 states. [2020-10-27 23:32:09,572 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 23:32:12,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:32:12,016 INFO L93 Difference]: Finished difference Result 17617 states and 26829 transitions. [2020-10-27 23:32:12,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:32:12,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 311 [2020-10-27 23:32:12,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:32:12,040 INFO L225 Difference]: With dead ends: 17617 [2020-10-27 23:32:12,040 INFO L226 Difference]: Without dead ends: 11715 [2020-10-27 23:32:12,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:32:12,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11715 states. [2020-10-27 23:32:12,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11715 to 11712. [2020-10-27 23:32:12,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11712 states. [2020-10-27 23:32:12,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11712 states to 11712 states and 17728 transitions. [2020-10-27 23:32:12,783 INFO L78 Accepts]: Start accepts. Automaton has 11712 states and 17728 transitions. Word has length 311 [2020-10-27 23:32:12,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:32:12,784 INFO L481 AbstractCegarLoop]: Abstraction has 11712 states and 17728 transitions. [2020-10-27 23:32:12,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:32:12,784 INFO L276 IsEmpty]: Start isEmpty. Operand 11712 states and 17728 transitions. [2020-10-27 23:32:12,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-27 23:32:12,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:32:12,804 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] [2020-10-27 23:32:12,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:32:12,805 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:32:12,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:32:12,805 INFO L82 PathProgramCache]: Analyzing trace with hash 273915602, now seen corresponding path program 1 times [2020-10-27 23:32:12,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:32:12,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388345752] [2020-10-27 23:32:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:32:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:12,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:12,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:13,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:13,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:13,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:13,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:13,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:13,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:13,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:13,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:13,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:13,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:13,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:13,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:14,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:14,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:14,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:15,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:15,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:15,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:17,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:17,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-27 23:32:17,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 23:32:17,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 23:32:17,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:17,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:32:17,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 23:32:17,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 23:32:17,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:32:19,182 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:32:19,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:32:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:19,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:19,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:19,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:32:19,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:32:19,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:32:19,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:19,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:32:19,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:32:19,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:32:19,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:32:19,297 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 23:32:19,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388345752] [2020-10-27 23:32:19,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:32:19,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:32:19,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130708061] [2020-10-27 23:32:19,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:32:19,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:32:19,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:32:19,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:32:19,299 INFO L87 Difference]: Start difference. First operand 11712 states and 17728 transitions. Second operand 4 states. [2020-10-27 23:32:29,869 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 300 [2020-10-27 23:32:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:32:32,314 INFO L93 Difference]: Finished difference Result 33878 states and 51097 transitions. [2020-10-27 23:32:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:32:32,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-27 23:32:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:32:32,352 INFO L225 Difference]: With dead ends: 33878 [2020-10-27 23:32:32,352 INFO L226 Difference]: Without dead ends: 22967 [2020-10-27 23:32:32,371 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 [2020-10-27 23:32:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22967 states. [2020-10-27 23:32:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22967 to 22964. [2020-10-27 23:32:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22964 states. [2020-10-27 23:32:34,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22964 states to 22964 states and 34503 transitions. [2020-10-27 23:32:34,108 INFO L78 Accepts]: Start accepts. Automaton has 22964 states and 34503 transitions. Word has length 313 [2020-10-27 23:32:34,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:32:34,109 INFO L481 AbstractCegarLoop]: Abstraction has 22964 states and 34503 transitions. [2020-10-27 23:32:34,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:32:34,109 INFO L276 IsEmpty]: Start isEmpty. Operand 22964 states and 34503 transitions. [2020-10-27 23:32:34,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-27 23:32:34,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:32:34,140 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] [2020-10-27 23:32:34,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:32:34,141 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:32:34,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:32:34,142 INFO L82 PathProgramCache]: Analyzing trace with hash 855083565, now seen corresponding path program 1 times [2020-10-27 23:32:34,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:32:34,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170263568] [2020-10-27 23:32:34,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:32:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:34,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:34,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:34,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:34,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:34,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:34,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:34,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:34,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:34,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:34,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:34,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:34,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:34,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:35,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:35,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:36,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:36,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:36,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:39,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:39,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-27 23:32:39,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:32:39,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:32:39,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:39,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:32:39,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 23:32:39,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:32:39,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:32:40,547 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:32:40,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:32:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:40,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:40,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:40,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:32:40,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:32:40,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:32:40,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:40,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:32:40,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:32:40,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:32:40,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:32:40,637 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 23:32:40,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170263568] [2020-10-27 23:32:40,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:32:40,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:32:40,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183247696] [2020-10-27 23:32:40,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:32:40,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:32:40,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:32:40,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:32:40,639 INFO L87 Difference]: Start difference. First operand 22964 states and 34503 transitions. Second operand 4 states. [2020-10-27 23:32:54,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:32:54,033 INFO L93 Difference]: Finished difference Result 67898 states and 101873 transitions. [2020-10-27 23:32:54,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 23:32:54,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-27 23:32:54,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:32:54,118 INFO L225 Difference]: With dead ends: 67898 [2020-10-27 23:32:54,118 INFO L226 Difference]: Without dead ends: 45439 [2020-10-27 23:32:54,163 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 [2020-10-27 23:32:54,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45439 states. [2020-10-27 23:32:55,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45439 to 23003. [2020-10-27 23:32:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23003 states. [2020-10-27 23:32:55,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23003 states to 23003 states and 34551 transitions. [2020-10-27 23:32:55,935 INFO L78 Accepts]: Start accepts. Automaton has 23003 states and 34551 transitions. Word has length 313 [2020-10-27 23:32:55,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:32:55,935 INFO L481 AbstractCegarLoop]: Abstraction has 23003 states and 34551 transitions. [2020-10-27 23:32:55,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:32:55,935 INFO L276 IsEmpty]: Start isEmpty. Operand 23003 states and 34551 transitions. [2020-10-27 23:32:55,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-10-27 23:32:55,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:32:55,959 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] [2020-10-27 23:32:55,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:32:55,959 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:32:55,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:32:55,960 INFO L82 PathProgramCache]: Analyzing trace with hash 377742461, now seen corresponding path program 1 times [2020-10-27 23:32:55,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:32:55,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765234740] [2020-10-27 23:32:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:32:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:56,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:56,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:56,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:56,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:56,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:56,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:56,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:56,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:56,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:56,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:56,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:56,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:57,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:57,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:57,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:57,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:57,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:59,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:59,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:01,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:01,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-27 23:33:01,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 23:33:01,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:33:01,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:01,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:33:01,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:33:01,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 23:33:01,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:33:02,298 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:33:02,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:33:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:02,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:02,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:02,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:33:02,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:33:02,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:33:02,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:02,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:33:02,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:33:02,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:33:02,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:33:02,437 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 23:33:02,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765234740] [2020-10-27 23:33:02,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:33:02,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:33:02,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955372303] [2020-10-27 23:33:02,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:33:02,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:33:02,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:33:02,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:33:02,439 INFO L87 Difference]: Start difference. First operand 23003 states and 34551 transitions. Second operand 4 states. [2020-10-27 23:33:14,712 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 300