/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:17:39,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:17:39,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:17:39,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:17:39,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:17:39,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:17:39,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:17:39,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:17:39,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:17:39,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:17:39,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:17:39,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:17:39,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:17:39,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:17:39,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:17:39,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:17:39,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:17:39,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:17:39,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:17:39,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:17:39,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:17:39,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:17:39,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:17:39,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:17:39,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:17:39,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:17:39,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:17:39,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:17:39,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:17:39,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:17:39,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:17:39,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:17:39,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:17:39,876 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:17:39,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:17:39,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:17:39,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:17:39,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:17:39,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:17:39,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:17:39,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:17:39,888 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:17:39,942 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:17:39,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:17:39,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:17:39,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:17:39,947 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:17:39,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:17:39,947 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:17:39,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:17:39,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:17:39,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:17:39,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:17:39,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:17:39,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:17:39,949 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:17:39,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:17:39,949 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:17:39,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:17:39,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:17:39,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:17:39,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:17:39,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:17:39,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:17:39,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:17:39,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:17:39,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:17:39,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:17:39,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:17:39,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:17:39,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:17:39,952 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:17:40,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:17:40,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:17:40,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:17:40,407 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:17:40,408 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:17:40,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:17:40,494 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fffa3a032/1aac57e3e14c41f58f6314d2be5c6961/FLAG2482f0111 [2020-10-28 18:17:41,375 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:17:41,376 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:17:41,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fffa3a032/1aac57e3e14c41f58f6314d2be5c6961/FLAG2482f0111 [2020-10-28 18:17:41,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fffa3a032/1aac57e3e14c41f58f6314d2be5c6961 [2020-10-28 18:17:41,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:17:41,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:17:41,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:17:41,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:17:41,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:17:41,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:17:41" (1/1) ... [2020-10-28 18:17:41,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bff91e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:41, skipping insertion in model container [2020-10-28 18:17:41,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:17:41" (1/1) ... [2020-10-28 18:17:41,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:17:41,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:17:42,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:17:42,390 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:17:42,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:17:42,768 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:17:42,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:42 WrapperNode [2020-10-28 18:17:42,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:17:42,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:17:42,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:17:42,771 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:17:42,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:42" (1/1) ... [2020-10-28 18:17:42,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:42" (1/1) ... [2020-10-28 18:17:42,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:42" (1/1) ... [2020-10-28 18:17:42,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:42" (1/1) ... [2020-10-28 18:17:42,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:42" (1/1) ... [2020-10-28 18:17:42,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:42" (1/1) ... [2020-10-28 18:17:42,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:42" (1/1) ... [2020-10-28 18:17:42,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:17:42,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:17:42,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:17:42,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:17:42,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:17:43,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:17:43,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:17:43,051 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:17:43,051 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:17:43,051 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:17:43,052 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:17:43,052 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:17:43,052 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:17:43,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:17:43,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:17:43,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:17:43,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:17:43,053 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:17:43,053 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:17:43,053 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:17:43,054 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:17:43,054 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:17:43,054 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:17:43,054 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:17:43,054 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:17:43,055 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:17:43,055 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:17:43,055 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:17:43,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:17:43,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:17:43,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:17:43,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:17:43,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:17:43,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:17:45,125 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:17:45,126 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:17:45,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:17:45 BoogieIcfgContainer [2020-10-28 18:17:45,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:17:45,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:17:45,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:17:45,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:17:45,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:17:41" (1/3) ... [2020-10-28 18:17:45,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eaeb632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:17:45, skipping insertion in model container [2020-10-28 18:17:45,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:42" (2/3) ... [2020-10-28 18:17:45,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eaeb632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:17:45, skipping insertion in model container [2020-10-28 18:17:45,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:17:45" (3/3) ... [2020-10-28 18:17:45,139 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:17:45,154 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:17:45,162 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:17:45,179 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:17:45,224 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:17:45,224 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:17:45,224 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:17:45,225 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:17:45,225 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:17:45,225 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:17:45,225 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:17:45,225 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:17:45,316 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states. [2020-10-28 18:17:45,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-28 18:17:45,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:45,350 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] [2020-10-28 18:17:45,351 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:45,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1021088061, now seen corresponding path program 1 times [2020-10-28 18:17:45,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:45,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256396560] [2020-10-28 18:17:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:46,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:47,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:47,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:47,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:48,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:48,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:48,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:48,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:49,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:49,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:50,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:51,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:51,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:51,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-28 18:17:51,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:17:51,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-28 18:17:51,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:51,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:51,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:51,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:51,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-28 18:17:51,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:17:52,262 WARN L193 SmtUtils]: Spent 623.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:17:52,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:52,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:52,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:52,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:52,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:52,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 18:17:52,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:52,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:52,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:52,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:17:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:52,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256396560] [2020-10-28 18:17:52,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:52,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:52,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059727317] [2020-10-28 18:17:52,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:52,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:52,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:52,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:52,580 INFO L87 Difference]: Start difference. First operand 636 states. Second operand 5 states. [2020-10-28 18:17:58,554 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:18:00,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:00,223 INFO L93 Difference]: Finished difference Result 1821 states and 3266 transitions. [2020-10-28 18:18:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:18:00,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2020-10-28 18:18:00,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:00,260 INFO L225 Difference]: With dead ends: 1821 [2020-10-28 18:18:00,261 INFO L226 Difference]: Without dead ends: 1210 [2020-10-28 18:18:00,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:00,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-10-28 18:18:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1171. [2020-10-28 18:18:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1171 states. [2020-10-28 18:18:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 1815 transitions. [2020-10-28 18:18:00,475 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 1815 transitions. Word has length 240 [2020-10-28 18:18:00,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:00,478 INFO L481 AbstractCegarLoop]: Abstraction has 1171 states and 1815 transitions. [2020-10-28 18:18:00,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:00,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 1815 transitions. [2020-10-28 18:18:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-28 18:18:00,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:00,492 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] [2020-10-28 18:18:00,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:18:00,496 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:00,497 INFO L82 PathProgramCache]: Analyzing trace with hash -952755016, now seen corresponding path program 1 times [2020-10-28 18:18:00,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:00,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455343215] [2020-10-28 18:18:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:00,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:00,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:01,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:01,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:01,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:01,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:01,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:01,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:02,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:02,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:03,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:03,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:03,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:04,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:05,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:05,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-28 18:18:05,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:18:05,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:18:05,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:05,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:05,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-28 18:18:05,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:18:06,317 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:18:06,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:06,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:06,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:06,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:06,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:06,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:18:06,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:06,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:06,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:06,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:06,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:06,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:18:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:18:06,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455343215] [2020-10-28 18:18:06,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:06,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:06,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55735696] [2020-10-28 18:18:06,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:06,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:06,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:06,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:06,640 INFO L87 Difference]: Start difference. First operand 1171 states and 1815 transitions. Second operand 5 states. [2020-10-28 18:18:11,524 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:18:13,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:13,154 INFO L93 Difference]: Finished difference Result 3447 states and 5338 transitions. [2020-10-28 18:18:13,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:13,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 242 [2020-10-28 18:18:13,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:13,170 INFO L225 Difference]: With dead ends: 3447 [2020-10-28 18:18:13,170 INFO L226 Difference]: Without dead ends: 2293 [2020-10-28 18:18:13,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:13,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2020-10-28 18:18:13,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2276. [2020-10-28 18:18:13,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2276 states. [2020-10-28 18:18:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 3508 transitions. [2020-10-28 18:18:13,297 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 3508 transitions. Word has length 242 [2020-10-28 18:18:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:13,298 INFO L481 AbstractCegarLoop]: Abstraction has 2276 states and 3508 transitions. [2020-10-28 18:18:13,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 3508 transitions. [2020-10-28 18:18:13,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-28 18:18:13,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:13,307 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] [2020-10-28 18:18:13,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:18:13,307 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:13,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:13,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1862767856, now seen corresponding path program 1 times [2020-10-28 18:18:13,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:13,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221182408] [2020-10-28 18:18:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:13,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:13,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:13,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:13,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:13,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:13,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:14,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:14,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:14,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:14,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:15,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:18,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:18,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:18,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-28 18:18:18,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:18:18,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:18:18,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:18,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:18,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:18:18,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 18:18:18,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-28 18:18:18,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:19,061 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:18:19,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:19,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:19,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:19,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:19,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:19,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:18:19,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:19,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:19,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:19,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:19,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:19,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:18:19,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221182408] [2020-10-28 18:18:19,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:19,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:18:19,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542946481] [2020-10-28 18:18:19,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:18:19,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:19,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:18:19,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:18:19,361 INFO L87 Difference]: Start difference. First operand 2276 states and 3508 transitions. Second operand 4 states. [2020-10-28 18:18:25,021 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 18:18:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:26,570 INFO L93 Difference]: Finished difference Result 6503 states and 9971 transitions. [2020-10-28 18:18:26,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:18:26,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2020-10-28 18:18:26,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:26,594 INFO L225 Difference]: With dead ends: 6503 [2020-10-28 18:18:26,595 INFO L226 Difference]: Without dead ends: 4417 [2020-10-28 18:18:26,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4417 states. [2020-10-28 18:18:26,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4417 to 4402. [2020-10-28 18:18:26,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4402 states. [2020-10-28 18:18:26,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4402 states to 4402 states and 6742 transitions. [2020-10-28 18:18:26,800 INFO L78 Accepts]: Start accepts. Automaton has 4402 states and 6742 transitions. Word has length 244 [2020-10-28 18:18:26,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:26,800 INFO L481 AbstractCegarLoop]: Abstraction has 4402 states and 6742 transitions. [2020-10-28 18:18:26,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:18:26,801 INFO L276 IsEmpty]: Start isEmpty. Operand 4402 states and 6742 transitions. [2020-10-28 18:18:26,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-28 18:18:26,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:26,812 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] [2020-10-28 18:18:26,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:18:26,813 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:26,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:26,813 INFO L82 PathProgramCache]: Analyzing trace with hash -941098443, now seen corresponding path program 1 times [2020-10-28 18:18:26,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:26,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656695085] [2020-10-28 18:18:26,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:26,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:26,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:27,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:27,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:27,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:27,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:27,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:27,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:27,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:28,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:28,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:28,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:31,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:31,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-28 18:18:31,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:18:31,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:18:31,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:31,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:31,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:18:31,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 18:18:31,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 18:18:31,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:32,533 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:18:32,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:32,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:32,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:32,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:32,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:32,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:18:32,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:32,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:32,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:32,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:32,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:32,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:18:32,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656695085] [2020-10-28 18:18:32,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:32,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:18:32,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80498812] [2020-10-28 18:18:32,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:18:32,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:32,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:18:32,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:18:32,713 INFO L87 Difference]: Start difference. First operand 4402 states and 6742 transitions. Second operand 4 states. [2020-10-28 18:18:38,110 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 18:18:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:39,675 INFO L93 Difference]: Finished difference Result 12743 states and 19446 transitions. [2020-10-28 18:18:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:18:39,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2020-10-28 18:18:39,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:39,718 INFO L225 Difference]: With dead ends: 12743 [2020-10-28 18:18:39,719 INFO L226 Difference]: Without dead ends: 8627 [2020-10-28 18:18:39,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:39,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8627 states. [2020-10-28 18:18:40,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8627 to 8523. [2020-10-28 18:18:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8523 states. [2020-10-28 18:18:40,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8523 states to 8523 states and 12968 transitions. [2020-10-28 18:18:40,102 INFO L78 Accepts]: Start accepts. Automaton has 8523 states and 12968 transitions. Word has length 244 [2020-10-28 18:18:40,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:40,102 INFO L481 AbstractCegarLoop]: Abstraction has 8523 states and 12968 transitions. [2020-10-28 18:18:40,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:18:40,102 INFO L276 IsEmpty]: Start isEmpty. Operand 8523 states and 12968 transitions. [2020-10-28 18:18:40,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-28 18:18:40,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:40,121 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] [2020-10-28 18:18:40,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:18:40,122 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:40,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:40,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1282394618, now seen corresponding path program 1 times [2020-10-28 18:18:40,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:40,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616301882] [2020-10-28 18:18:40,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:40,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:40,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:40,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:40,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:40,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:40,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:40,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:40,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:40,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:41,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:43,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:43,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:43,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:45,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:45,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-28 18:18:45,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:18:45,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 18:18:45,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:45,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:45,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:45,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:45,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-28 18:18:45,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:46,025 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:18:46,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:46,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:46,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:46,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:46,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:46,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:18:46,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:46,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:46,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:46,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:46,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:46,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:18:46,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616301882] [2020-10-28 18:18:46,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:46,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:46,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102009542] [2020-10-28 18:18:46,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:46,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:46,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:46,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:46,225 INFO L87 Difference]: Start difference. First operand 8523 states and 12968 transitions. Second operand 5 states. [2020-10-28 18:18:51,885 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:18:53,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:53,912 INFO L93 Difference]: Finished difference Result 24646 states and 37313 transitions. [2020-10-28 18:18:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:53,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 244 [2020-10-28 18:18:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:53,977 INFO L225 Difference]: With dead ends: 24646 [2020-10-28 18:18:53,977 INFO L226 Difference]: Without dead ends: 16692 [2020-10-28 18:18:53,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:54,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16692 states. [2020-10-28 18:18:55,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16692 to 16656. [2020-10-28 18:18:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16656 states. [2020-10-28 18:18:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16656 states to 16656 states and 25173 transitions. [2020-10-28 18:18:55,084 INFO L78 Accepts]: Start accepts. Automaton has 16656 states and 25173 transitions. Word has length 244 [2020-10-28 18:18:55,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:55,084 INFO L481 AbstractCegarLoop]: Abstraction has 16656 states and 25173 transitions. [2020-10-28 18:18:55,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:55,084 INFO L276 IsEmpty]: Start isEmpty. Operand 16656 states and 25173 transitions. [2020-10-28 18:18:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-28 18:18:55,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:55,122 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] [2020-10-28 18:18:55,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:18:55,122 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:55,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:55,123 INFO L82 PathProgramCache]: Analyzing trace with hash 32607767, now seen corresponding path program 1 times [2020-10-28 18:18:55,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:55,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019660656] [2020-10-28 18:18:55,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:55,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:55,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:55,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:55,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:55,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:55,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:55,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:55,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:55,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:55,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:58,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:00,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:00,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-28 18:19:00,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:19:00,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 18:19:00,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:00,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:00,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:19:00,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:19:00,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-28 18:19:00,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:00,765 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:19:00,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:00,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:00,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:00,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:00,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:00,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:19:00,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:00,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:00,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:00,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:00,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:00,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:19:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:19:00,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019660656] [2020-10-28 18:19:00,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:00,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:19:00,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747234372] [2020-10-28 18:19:00,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:19:00,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:00,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:19:00,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:00,950 INFO L87 Difference]: Start difference. First operand 16656 states and 25173 transitions. Second operand 5 states. [2020-10-28 18:19:07,052 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:19:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:09,348 INFO L93 Difference]: Finished difference Result 48328 states and 72740 transitions. [2020-10-28 18:19:09,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:19:09,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 246 [2020-10-28 18:19:09,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:09,417 INFO L225 Difference]: With dead ends: 48328 [2020-10-28 18:19:09,417 INFO L226 Difference]: Without dead ends: 32568 [2020-10-28 18:19:09,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:19:09,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32568 states. [2020-10-28 18:19:11,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32568 to 32555. [2020-10-28 18:19:11,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32555 states. [2020-10-28 18:19:11,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32555 states to 32555 states and 48842 transitions. [2020-10-28 18:19:11,450 INFO L78 Accepts]: Start accepts. Automaton has 32555 states and 48842 transitions. Word has length 246 [2020-10-28 18:19:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:11,450 INFO L481 AbstractCegarLoop]: Abstraction has 32555 states and 48842 transitions. [2020-10-28 18:19:11,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:19:11,450 INFO L276 IsEmpty]: Start isEmpty. Operand 32555 states and 48842 transitions. [2020-10-28 18:19:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-28 18:19:11,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:11,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:19:11,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:19:11,517 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:11,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:11,518 INFO L82 PathProgramCache]: Analyzing trace with hash -456856126, now seen corresponding path program 1 times [2020-10-28 18:19:11,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:11,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311685667] [2020-10-28 18:19:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:11,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:11,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:11,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:11,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:11,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:11,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:11,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:11,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:12,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:12,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:13,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:13,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:13,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:16,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:16,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-28 18:19:16,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:19:16,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 18:19:16,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:16,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:16,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:19:16,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:19:16,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-28 18:19:16,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:17,207 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:19:17,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:17,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:17,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:17,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:17,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:17,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:19:17,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:17,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:17,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:19:17,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311685667] [2020-10-28 18:19:17,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:17,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:19:17,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104597951] [2020-10-28 18:19:17,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:19:17,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:17,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:19:17,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:17,357 INFO L87 Difference]: Start difference. First operand 32555 states and 48842 transitions. Second operand 5 states. [2020-10-28 18:19:25,894 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:19:28,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:28,865 INFO L93 Difference]: Finished difference Result 94284 states and 140791 transitions. [2020-10-28 18:19:28,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:19:28,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 248 [2020-10-28 18:19:28,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:29,019 INFO L225 Difference]: With dead ends: 94284 [2020-10-28 18:19:29,019 INFO L226 Difference]: Without dead ends: 64010 [2020-10-28 18:19:29,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:19:29,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64010 states. [2020-10-28 18:19:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64010 to 63784. [2020-10-28 18:19:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63784 states. [2020-10-28 18:19:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63784 states to 63784 states and 95017 transitions. [2020-10-28 18:19:33,458 INFO L78 Accepts]: Start accepts. Automaton has 63784 states and 95017 transitions. Word has length 248 [2020-10-28 18:19:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:33,458 INFO L481 AbstractCegarLoop]: Abstraction has 63784 states and 95017 transitions. [2020-10-28 18:19:33,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:19:33,459 INFO L276 IsEmpty]: Start isEmpty. Operand 63784 states and 95017 transitions. [2020-10-28 18:19:33,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-28 18:19:33,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:33,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:19:33,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:19:33,523 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:33,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:33,523 INFO L82 PathProgramCache]: Analyzing trace with hash 953384299, now seen corresponding path program 1 times [2020-10-28 18:19:33,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:33,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197390381] [2020-10-28 18:19:33,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:33,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:33,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:33,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:33,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:33,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:34,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:34,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:34,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:34,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:34,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:34,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:36,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:38,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:38,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-10-28 18:19:38,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:19:38,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 18:19:38,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:38,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:38,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:19:38,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:19:38,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-28 18:19:38,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:39,186 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:19:39,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:39,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:39,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:39,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:39,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:39,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:19:39,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:39,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:39,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:39,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:39,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:39,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:19:39,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197390381] [2020-10-28 18:19:39,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:39,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:19:39,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459567854] [2020-10-28 18:19:39,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:19:39,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:39,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:19:39,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:39,347 INFO L87 Difference]: Start difference. First operand 63784 states and 95017 transitions. Second operand 5 states. [2020-10-28 18:19:47,715 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:19:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:50,908 INFO L93 Difference]: Finished difference Result 137468 states and 204571 transitions. [2020-10-28 18:19:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:19:50,908 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 250 [2020-10-28 18:19:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:51,040 INFO L225 Difference]: With dead ends: 137468 [2020-10-28 18:19:51,040 INFO L226 Difference]: Without dead ends: 74912 [2020-10-28 18:19:51,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:19:51,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74912 states. [2020-10-28 18:19:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74912 to 63326. [2020-10-28 18:19:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63326 states. [2020-10-28 18:19:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63326 states to 63326 states and 94019 transitions. [2020-10-28 18:19:55,554 INFO L78 Accepts]: Start accepts. Automaton has 63326 states and 94019 transitions. Word has length 250 [2020-10-28 18:19:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:55,554 INFO L481 AbstractCegarLoop]: Abstraction has 63326 states and 94019 transitions. [2020-10-28 18:19:55,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:19:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 63326 states and 94019 transitions. [2020-10-28 18:19:55,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-28 18:19:55,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:55,623 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] [2020-10-28 18:19:55,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:19:55,623 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:55,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:55,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2014097633, now seen corresponding path program 1 times [2020-10-28 18:19:55,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:55,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926461422] [2020-10-28 18:19:55,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:55,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:55,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:55,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:56,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:56,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:56,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:56,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:56,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:56,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:56,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:56,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:56,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:00,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:00,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-28 18:20:00,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:20:00,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:20:00,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:00,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:00,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:20:00,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:20:00,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 18:20:00,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:01,382 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:20:01,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:20:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:01,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:01,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:01,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:20:01,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:20:01,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:20:01,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:01,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:01,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:20:01,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:20:01,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:20:01,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:20:01,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926461422] [2020-10-28 18:20:01,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:20:01,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:20:01,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574023864] [2020-10-28 18:20:01,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:20:01,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:20:01,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:20:01,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:20:01,511 INFO L87 Difference]: Start difference. First operand 63326 states and 94019 transitions. Second operand 5 states. [2020-10-28 18:20:13,278 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:20:18,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:20:18,139 INFO L93 Difference]: Finished difference Result 183180 states and 270688 transitions. [2020-10-28 18:20:18,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:20:18,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 252 [2020-10-28 18:20:18,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:20:18,345 INFO L225 Difference]: With dead ends: 183180 [2020-10-28 18:20:18,346 INFO L226 Difference]: Without dead ends: 123994 [2020-10-28 18:20:18,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:20:18,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123994 states. [2020-10-28 18:20:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123994 to 123592. [2020-10-28 18:20:28,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123592 states. [2020-10-28 18:20:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123592 states to 123592 states and 182043 transitions. [2020-10-28 18:20:29,015 INFO L78 Accepts]: Start accepts. Automaton has 123592 states and 182043 transitions. Word has length 252 [2020-10-28 18:20:29,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:20:29,015 INFO L481 AbstractCegarLoop]: Abstraction has 123592 states and 182043 transitions. [2020-10-28 18:20:29,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:20:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 123592 states and 182043 transitions. [2020-10-28 18:20:29,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-28 18:20:29,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:20:29,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:20:29,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:20:29,146 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:20:29,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:20:29,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1568825202, now seen corresponding path program 1 times [2020-10-28 18:20:29,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:20:29,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959584840] [2020-10-28 18:20:29,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:20:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:29,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:29,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:29,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:29,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:29,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:29,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:29,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:29,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:29,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:29,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:29,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:29,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:34,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:34,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-28 18:20:34,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:20:34,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:20:34,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:34,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:34,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:20:34,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:20:34,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-28 18:20:34,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:34,800 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:20:34,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:20:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:34,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:34,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:34,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:20:34,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:20:34,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:20:34,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:34,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:34,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:20:34,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:20:34,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:20:34,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:20:34,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959584840] [2020-10-28 18:20:34,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:20:34,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:20:34,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252741994] [2020-10-28 18:20:34,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:20:34,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:20:34,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:20:34,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:20:34,930 INFO L87 Difference]: Start difference. First operand 123592 states and 182043 transitions. Second operand 5 states. [2020-10-28 18:20:54,228 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:21:02,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:21:02,581 INFO L93 Difference]: Finished difference Result 355860 states and 521029 transitions. [2020-10-28 18:21:02,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:21:02,582 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 254 [2020-10-28 18:21:02,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:21:02,971 INFO L225 Difference]: With dead ends: 355860 [2020-10-28 18:21:02,971 INFO L226 Difference]: Without dead ends: 239552 [2020-10-28 18:21:03,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:21:03,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239552 states.