/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:36:09,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:36:09,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:36:09,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:36:09,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:36:09,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:36:09,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:36:09,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:36:09,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:36:09,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:36:09,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:36:09,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:36:09,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:36:09,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:36:09,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:36:09,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:36:09,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:36:09,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:36:09,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:36:09,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:36:09,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:36:09,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:36:09,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:36:09,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:36:09,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:36:09,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:36:09,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:36:09,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:36:09,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:36:09,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:36:09,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:36:09,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:36:09,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:36:09,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:36:09,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:36:09,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:36:09,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:36:09,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:36:09,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:36:09,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:36:09,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:36:09,099 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 23:36:09,127 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:36:09,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:36:09,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:36:09,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:36:09,129 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:36:09,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:36:09,130 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:36:09,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:36:09,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:36:09,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:36:09,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:36:09,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:36:09,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:36:09,131 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:36:09,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:36:09,132 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:36:09,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:36:09,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:36:09,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:36:09,133 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:36:09,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:36:09,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:36:09,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:36:09,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:36:09,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:36:09,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:36:09,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:36:09,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:36:09,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:36:09,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:36:09,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:36:09,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:36:09,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:36:09,597 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:36:09,598 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:36:09,599 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-27 23:36:09,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0bbb81043/b454debb4df0447d87c9084a384bf2bd/FLAG548882d4d [2020-10-27 23:36:10,622 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:36:10,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-27 23:36:10,650 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0bbb81043/b454debb4df0447d87c9084a384bf2bd/FLAG548882d4d [2020-10-27 23:36:10,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0bbb81043/b454debb4df0447d87c9084a384bf2bd [2020-10-27 23:36:10,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:36:10,749 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:36:10,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:36:10,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:36:10,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:36:10,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:36:10" (1/1) ... [2020-10-27 23:36:10,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@704f08a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:36:10, skipping insertion in model container [2020-10-27 23:36:10,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:36:10" (1/1) ... [2020-10-27 23:36:10,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:36:10,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:36:12,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:36:12,318 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:36:12,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:36:12,903 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:36:12,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:36:12 WrapperNode [2020-10-27 23:36:12,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:36:12,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:36:12,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:36:12,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:36:12,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:36:12" (1/1) ... [2020-10-27 23:36:12,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:36:12" (1/1) ... [2020-10-27 23:36:12,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:36:12" (1/1) ... [2020-10-27 23:36:12,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:36:12" (1/1) ... [2020-10-27 23:36:13,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:36:12" (1/1) ... [2020-10-27 23:36:13,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:36:12" (1/1) ... [2020-10-27 23:36:13,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:36:12" (1/1) ... [2020-10-27 23:36:13,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:36:13,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:36:13,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:36:13,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:36:13,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:36:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:36:13,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:36:13,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:36:13,244 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:36:13,244 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:36:13,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:36:13,244 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:36:13,244 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:36:13,244 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:36:13,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:36:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:36:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:36:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:36:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:36:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:36:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:36:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:36:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:36:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:36:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:36:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 23:36:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:36:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:36:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:36:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:36:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:36:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:36:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:36:13,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:36:13,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:36:18,045 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:36:18,046 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:36:18,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:36:18 BoogieIcfgContainer [2020-10-27 23:36:18,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:36:18,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:36:18,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:36:18,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:36:18,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:36:10" (1/3) ... [2020-10-27 23:36:18,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ae01e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:36:18, skipping insertion in model container [2020-10-27 23:36:18,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:36:12" (2/3) ... [2020-10-27 23:36:18,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ae01e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:36:18, skipping insertion in model container [2020-10-27 23:36:18,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:36:18" (3/3) ... [2020-10-27 23:36:18,064 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-27 23:36:18,078 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:36:18,085 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:36:18,100 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:36:18,149 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:36:18,149 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:36:18,150 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:36:18,150 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:36:18,150 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:36:18,150 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:36:18,150 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:36:18,150 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:36:18,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states. [2020-10-27 23:36:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-27 23:36:18,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:36:18,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:36:18,252 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:36:18,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:36:18,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1159884069, now seen corresponding path program 1 times [2020-10-27 23:36:18,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:36:18,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854260280] [2020-10-27 23:36:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:36:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:36:19,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:19,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:19,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:20,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:20,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:20,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:21,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:21,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:22,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:23,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:23,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:24,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:24,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:36:24,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 349 [2020-10-27 23:36:24,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:36:24,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5179 [2020-10-27 23:36:24,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:36:24,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:36:24,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 171 [2020-10-27 23:36:24,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:36:24,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 23:36:26,069 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-27 23:36:26,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:36:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:36:26,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:26,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:36:26,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:36:26,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:36:26,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 23:36:26,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:36:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:36:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:36:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:36:26,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:36:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:36:26,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854260280] [2020-10-27 23:36:26,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:36:26,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:36:26,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415321574] [2020-10-27 23:36:26,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:36:26,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:36:26,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:36:26,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:36:26,415 INFO L87 Difference]: Start difference. First operand 1423 states. Second operand 4 states. [2020-10-27 23:36:27,807 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 413 [2020-10-27 23:36:40,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:36:40,884 INFO L93 Difference]: Finished difference Result 2615 states and 4578 transitions. [2020-10-27 23:36:40,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:36:40,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 341 [2020-10-27 23:36:40,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:36:40,934 INFO L225 Difference]: With dead ends: 2615 [2020-10-27 23:36:40,935 INFO L226 Difference]: Without dead ends: 1863 [2020-10-27 23:36:40,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:36:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2020-10-27 23:36:41,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1860. [2020-10-27 23:36:41,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1860 states. [2020-10-27 23:36:41,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 3122 transitions. [2020-10-27 23:36:41,135 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 3122 transitions. Word has length 341 [2020-10-27 23:36:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:36:41,136 INFO L481 AbstractCegarLoop]: Abstraction has 1860 states and 3122 transitions. [2020-10-27 23:36:41,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:36:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 3122 transitions. [2020-10-27 23:36:41,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-10-27 23:36:41,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:36:41,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:36:41,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:36:41,148 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:36:41,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:36:41,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1954339985, now seen corresponding path program 1 times [2020-10-27 23:36:41,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:36:41,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405565024] [2020-10-27 23:36:41,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:36:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:36:41,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:41,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:41,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:41,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:42,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:42,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:42,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:43,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:43,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:43,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:44,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:44,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:44,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:45,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:45,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:46,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:36:46,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 351 [2020-10-27 23:36:46,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:36:46,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 23:36:46,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:36:46,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:36:46,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 179 [2020-10-27 23:36:46,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 23:36:46,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:36:47,762 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-27 23:36:47,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:36:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:36:47,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:47,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:36:47,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:36:47,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:36:47,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 23:36:47,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:36:47,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:36:47,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:36:47,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:36:47,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:36:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:36:48,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405565024] [2020-10-27 23:36:48,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:36:48,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:36:48,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417669049] [2020-10-27 23:36:48,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:36:48,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:36:48,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:36:48,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:36:48,100 INFO L87 Difference]: Start difference. First operand 1860 states and 3122 transitions. Second operand 4 states. [2020-10-27 23:36:49,322 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 417 [2020-10-27 23:37:02,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:37:02,507 INFO L93 Difference]: Finished difference Result 4232 states and 6984 transitions. [2020-10-27 23:37:02,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:37:02,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 343 [2020-10-27 23:37:02,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:37:02,528 INFO L225 Difference]: With dead ends: 4232 [2020-10-27 23:37:02,529 INFO L226 Difference]: Without dead ends: 3089 [2020-10-27 23:37:02,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:37:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2020-10-27 23:37:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 2932. [2020-10-27 23:37:02,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2932 states. [2020-10-27 23:37:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 4859 transitions. [2020-10-27 23:37:02,712 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 4859 transitions. Word has length 343 [2020-10-27 23:37:02,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:37:02,714 INFO L481 AbstractCegarLoop]: Abstraction has 2932 states and 4859 transitions. [2020-10-27 23:37:02,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:37:02,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 4859 transitions. [2020-10-27 23:37:02,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-10-27 23:37:02,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:37:02,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:37:02,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:37:02,727 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:37:02,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:37:02,730 INFO L82 PathProgramCache]: Analyzing trace with hash 420670715, now seen corresponding path program 1 times [2020-10-27 23:37:02,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:37:02,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797216731] [2020-10-27 23:37:02,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:37:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:37:02,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:03,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:03,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:03,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:03,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:03,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:04,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:04,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:04,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:05,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:05,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:05,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:05,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:06,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:06,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:07,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:37:07,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 353 [2020-10-27 23:37:07,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:37:07,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-27 23:37:07,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:37:07,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:37:07,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-27 23:37:07,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 23:37:07,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:37:09,184 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-27 23:37:09,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:37:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:37:09,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:09,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:37:09,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:37:09,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:37:09,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 23:37:09,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:37:09,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:37:09,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:37:09,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:37:09,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:37:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:37:09,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797216731] [2020-10-27 23:37:09,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:37:09,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:37:09,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589708597] [2020-10-27 23:37:09,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:37:09,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:37:09,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:37:09,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:37:09,494 INFO L87 Difference]: Start difference. First operand 2932 states and 4859 transitions. Second operand 4 states. [2020-10-27 23:37:10,709 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 417 [2020-10-27 23:37:21,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:37:21,926 INFO L93 Difference]: Finished difference Result 7123 states and 11655 transitions. [2020-10-27 23:37:21,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:37:21,928 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 345 [2020-10-27 23:37:21,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:37:21,953 INFO L225 Difference]: With dead ends: 7123 [2020-10-27 23:37:21,954 INFO L226 Difference]: Without dead ends: 5098 [2020-10-27 23:37:21,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:37:21,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5098 states. [2020-10-27 23:37:22,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5098 to 4787. [2020-10-27 23:37:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4787 states. [2020-10-27 23:37:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4787 states to 4787 states and 7845 transitions. [2020-10-27 23:37:22,196 INFO L78 Accepts]: Start accepts. Automaton has 4787 states and 7845 transitions. Word has length 345 [2020-10-27 23:37:22,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:37:22,197 INFO L481 AbstractCegarLoop]: Abstraction has 4787 states and 7845 transitions. [2020-10-27 23:37:22,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:37:22,198 INFO L276 IsEmpty]: Start isEmpty. Operand 4787 states and 7845 transitions. [2020-10-27 23:37:22,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-10-27 23:37:22,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:37:22,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:37:22,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:37:22,213 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:37:22,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:37:22,214 INFO L82 PathProgramCache]: Analyzing trace with hash 495306011, now seen corresponding path program 1 times [2020-10-27 23:37:22,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:37:22,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325418571] [2020-10-27 23:37:22,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:37:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:37:22,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:22,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:22,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:22,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:23,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:23,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:23,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:23,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:24,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:24,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:24,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:25,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:25,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:26,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:26,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:26,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:27,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:37:27,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 355 [2020-10-27 23:37:27,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:37:27,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-27 23:37:27,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:37:27,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:37:27,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 192 [2020-10-27 23:37:27,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 23:37:27,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:37:28,767 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-27 23:37:28,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:37:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:37:28,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:28,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:37:28,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:37:28,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:37:28,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 23:37:28,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:37:28,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:37:28,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:37:28,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:37:28,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:37:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:37:29,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325418571] [2020-10-27 23:37:29,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:37:29,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:37:29,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360430557] [2020-10-27 23:37:29,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:37:29,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:37:29,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:37:29,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:37:29,171 INFO L87 Difference]: Start difference. First operand 4787 states and 7845 transitions. Second operand 4 states. [2020-10-27 23:37:30,441 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 417 [2020-10-27 23:37:43,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:37:43,274 INFO L93 Difference]: Finished difference Result 12069 states and 19585 transitions. [2020-10-27 23:37:43,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:37:43,275 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 347 [2020-10-27 23:37:43,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:37:43,315 INFO L225 Difference]: With dead ends: 12069 [2020-10-27 23:37:43,315 INFO L226 Difference]: Without dead ends: 8538 [2020-10-27 23:37:43,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:37:43,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8538 states. [2020-10-27 23:37:43,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8538 to 7919. [2020-10-27 23:37:43,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7919 states. [2020-10-27 23:37:43,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7919 states to 7919 states and 12841 transitions. [2020-10-27 23:37:43,745 INFO L78 Accepts]: Start accepts. Automaton has 7919 states and 12841 transitions. Word has length 347 [2020-10-27 23:37:43,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:37:43,745 INFO L481 AbstractCegarLoop]: Abstraction has 7919 states and 12841 transitions. [2020-10-27 23:37:43,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:37:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 7919 states and 12841 transitions. [2020-10-27 23:37:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-27 23:37:43,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:37:43,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:37:43,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:37:43,768 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:37:43,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:37:43,769 INFO L82 PathProgramCache]: Analyzing trace with hash 190491161, now seen corresponding path program 1 times [2020-10-27 23:37:43,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:37:43,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606327582] [2020-10-27 23:37:43,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:37:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:37:43,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:44,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:44,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:44,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:44,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:44,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:45,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:45,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:45,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:45,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:46,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:46,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:46,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:47,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:47,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:47,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:47,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:48,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:48,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:37:48,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-27 23:37:48,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:37:48,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-27 23:37:48,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:37:48,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:37:48,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 198 [2020-10-27 23:37:48,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 23:37:48,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:37:50,424 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-27 23:37:50,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:37:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:37:50,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:37:50,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:37:50,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:37:50,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:37:50,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:37:50,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:37:50,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:37:50,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:37:50,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:37:50,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:37:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:37:50,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606327582] [2020-10-27 23:37:50,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:37:50,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:37:50,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703533275] [2020-10-27 23:37:50,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:37:50,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:37:50,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:37:50,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:37:50,586 INFO L87 Difference]: Start difference. First operand 7919 states and 12841 transitions. Second operand 4 states. [2020-10-27 23:37:51,889 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 417 [2020-10-27 23:38:05,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:38:05,823 INFO L93 Difference]: Finished difference Result 20289 states and 32621 transitions. [2020-10-27 23:38:05,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:38:05,824 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 349 [2020-10-27 23:38:05,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:38:05,870 INFO L225 Difference]: With dead ends: 20289 [2020-10-27 23:38:05,871 INFO L226 Difference]: Without dead ends: 14262 [2020-10-27 23:38:05,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:38:05,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14262 states. [2020-10-27 23:38:06,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14262 to 13027. [2020-10-27 23:38:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13027 states. [2020-10-27 23:38:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13027 states to 13027 states and 20881 transitions. [2020-10-27 23:38:06,615 INFO L78 Accepts]: Start accepts. Automaton has 13027 states and 20881 transitions. Word has length 349 [2020-10-27 23:38:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:38:06,616 INFO L481 AbstractCegarLoop]: Abstraction has 13027 states and 20881 transitions. [2020-10-27 23:38:06,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:38:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 13027 states and 20881 transitions. [2020-10-27 23:38:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-27 23:38:06,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:06,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:38:06,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:38:06,645 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:06,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:06,646 INFO L82 PathProgramCache]: Analyzing trace with hash 799065868, now seen corresponding path program 1 times [2020-10-27 23:38:06,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:06,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258661509] [2020-10-27 23:38:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:06,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:07,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:07,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:07,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:07,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:07,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:07,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:07,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:08,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:08,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:08,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:08,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:09,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:09,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:09,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:10,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:11,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:11,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 359 [2020-10-27 23:38:11,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:38:11,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-27 23:38:11,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:11,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:38:11,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-10-27 23:38:11,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 23:38:11,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:13,221 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-27 23:38:13,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:13,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:13,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:13,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:13,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:13,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:38:13,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:13,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:13,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:13,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:13,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:38:13,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258661509] [2020-10-27 23:38:13,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:38:13,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:38:13,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476535806] [2020-10-27 23:38:13,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:38:13,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:13,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:38:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:38:13,387 INFO L87 Difference]: Start difference. First operand 13027 states and 20881 transitions. Second operand 4 states. [2020-10-27 23:38:24,616 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-27 23:38:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:38:25,871 INFO L93 Difference]: Finished difference Result 18361 states and 29717 transitions. [2020-10-27 23:38:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:38:25,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 351 [2020-10-27 23:38:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:38:25,894 INFO L225 Difference]: With dead ends: 18361 [2020-10-27 23:38:25,895 INFO L226 Difference]: Without dead ends: 9478 [2020-10-27 23:38:25,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:38:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9478 states. [2020-10-27 23:38:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9478 to 9475. [2020-10-27 23:38:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9475 states. [2020-10-27 23:38:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9475 states to 9475 states and 15345 transitions. [2020-10-27 23:38:26,356 INFO L78 Accepts]: Start accepts. Automaton has 9475 states and 15345 transitions. Word has length 351 [2020-10-27 23:38:26,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:38:26,356 INFO L481 AbstractCegarLoop]: Abstraction has 9475 states and 15345 transitions. [2020-10-27 23:38:26,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:38:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 9475 states and 15345 transitions. [2020-10-27 23:38:26,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-27 23:38:26,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:26,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:38:26,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:38:26,372 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:26,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:26,373 INFO L82 PathProgramCache]: Analyzing trace with hash 25043089, now seen corresponding path program 1 times [2020-10-27 23:38:26,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:26,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198522907] [2020-10-27 23:38:26,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:26,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:26,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:26,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:26,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:27,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:27,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:27,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:27,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:27,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:28,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:28,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:28,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:28,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:28,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:29,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:29,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:30,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:31,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:31,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 359 [2020-10-27 23:38:31,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 23:38:31,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-27 23:38:31,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:31,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:38:31,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-10-27 23:38:31,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 23:38:31,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:32,780 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-27 23:38:32,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:32,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:32,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:32,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:32,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:32,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 23:38:32,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:32,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:32,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:32,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:32,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:38:32,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198522907] [2020-10-27 23:38:32,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:38:32,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:38:32,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953973118] [2020-10-27 23:38:32,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:38:32,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:32,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:38:32,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:38:32,936 INFO L87 Difference]: Start difference. First operand 9475 states and 15345 transitions. Second operand 4 states. [2020-10-27 23:38:34,152 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 413 [2020-10-27 23:38:45,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:38:45,744 INFO L93 Difference]: Finished difference Result 15853 states and 25773 transitions. [2020-10-27 23:38:45,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:38:45,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 351 [2020-10-27 23:38:45,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:38:45,769 INFO L225 Difference]: With dead ends: 15853 [2020-10-27 23:38:45,770 INFO L226 Difference]: Without dead ends: 8698 [2020-10-27 23:38:45,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:38:45,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8698 states. [2020-10-27 23:38:46,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8698 to 8695. [2020-10-27 23:38:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8695 states. [2020-10-27 23:38:46,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8695 states to 8695 states and 14145 transitions. [2020-10-27 23:38:46,344 INFO L78 Accepts]: Start accepts. Automaton has 8695 states and 14145 transitions. Word has length 351 [2020-10-27 23:38:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:38:46,345 INFO L481 AbstractCegarLoop]: Abstraction has 8695 states and 14145 transitions. [2020-10-27 23:38:46,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:38:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 8695 states and 14145 transitions. [2020-10-27 23:38:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-27 23:38:46,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:46,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:38:46,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:38:46,357 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:46,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:46,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1076665004, now seen corresponding path program 1 times [2020-10-27 23:38:46,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:46,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469548185] [2020-10-27 23:38:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:46,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:46,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:46,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:46,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:47,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:47,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:47,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:48,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:48,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:49,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:49,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:49,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:49,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:49,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:50,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:50,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:50,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:51,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:51,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 359 [2020-10-27 23:38:51,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 23:38:51,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:38:51,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:51,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:38:51,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 228 [2020-10-27 23:38:51,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 23:38:51,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:52,685 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-27 23:38:52,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:52,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:52,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:52,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:52,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:52,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 23:38:52,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:52,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:52,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:52,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:52,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:38:52,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469548185] [2020-10-27 23:38:52,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:38:52,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:38:52,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229288414] [2020-10-27 23:38:52,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:38:52,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:52,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:38:52,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:38:52,845 INFO L87 Difference]: Start difference. First operand 8695 states and 14145 transitions. Second operand 4 states. [2020-10-27 23:39:04,394 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-27 23:39:06,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:39:06,104 INFO L93 Difference]: Finished difference Result 15641 states and 25513 transitions. [2020-10-27 23:39:06,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:39:06,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 351 [2020-10-27 23:39:06,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:39:06,121 INFO L225 Difference]: With dead ends: 15641 [2020-10-27 23:39:06,122 INFO L226 Difference]: Without dead ends: 8698 [2020-10-27 23:39:06,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:39:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8698 states. [2020-10-27 23:39:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8698 to 8695. [2020-10-27 23:39:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8695 states. [2020-10-27 23:39:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8695 states to 8695 states and 14109 transitions. [2020-10-27 23:39:06,528 INFO L78 Accepts]: Start accepts. Automaton has 8695 states and 14109 transitions. Word has length 351 [2020-10-27 23:39:06,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:39:06,529 INFO L481 AbstractCegarLoop]: Abstraction has 8695 states and 14109 transitions. [2020-10-27 23:39:06,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:39:06,529 INFO L276 IsEmpty]: Start isEmpty. Operand 8695 states and 14109 transitions. [2020-10-27 23:39:06,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-27 23:39:06,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:39:06,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:39:06,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:39:06,538 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:39:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:39:06,538 INFO L82 PathProgramCache]: Analyzing trace with hash -62410838, now seen corresponding path program 1 times [2020-10-27 23:39:06,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:39:06,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919509250] [2020-10-27 23:39:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:39:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:06,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:06,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:06,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:06,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:07,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:07,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:07,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:07,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:07,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:08,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:08,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:08,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:08,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:08,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:09,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:09,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:09,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:11,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:11,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 359 [2020-10-27 23:39:11,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 23:39:11,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:39:11,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:11,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:39:11,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 241 [2020-10-27 23:39:11,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 23:39:11,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:12,902 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-27 23:39:12,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:39:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:12,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:12,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:12,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:39:12,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:39:12,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 23:39:12,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:12,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:39:12,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:39:12,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:39:12,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:39:13,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919509250] [2020-10-27 23:39:13,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:39:13,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:39:13,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478967089] [2020-10-27 23:39:13,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:39:13,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:39:13,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:39:13,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:39:13,058 INFO L87 Difference]: Start difference. First operand 8695 states and 14109 transitions. Second operand 4 states. [2020-10-27 23:39:24,623 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-27 23:39:26,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:39:26,306 INFO L93 Difference]: Finished difference Result 15245 states and 24801 transitions. [2020-10-27 23:39:26,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:39:26,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 351 [2020-10-27 23:39:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:39:26,320 INFO L225 Difference]: With dead ends: 15245 [2020-10-27 23:39:26,321 INFO L226 Difference]: Without dead ends: 8698 [2020-10-27 23:39:26,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:39:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8698 states. [2020-10-27 23:39:26,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8698 to 8695. [2020-10-27 23:39:26,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8695 states. [2020-10-27 23:39:26,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8695 states to 8695 states and 14073 transitions. [2020-10-27 23:39:26,807 INFO L78 Accepts]: Start accepts. Automaton has 8695 states and 14073 transitions. Word has length 351 [2020-10-27 23:39:26,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:39:26,808 INFO L481 AbstractCegarLoop]: Abstraction has 8695 states and 14073 transitions. [2020-10-27 23:39:26,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:39:26,808 INFO L276 IsEmpty]: Start isEmpty. Operand 8695 states and 14073 transitions. [2020-10-27 23:39:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-27 23:39:26,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:39:26,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:39:26,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:39:26,820 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:39:26,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:39:26,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1611907194, now seen corresponding path program 1 times [2020-10-27 23:39:26,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:39:26,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952670636] [2020-10-27 23:39:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:39:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:26,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:27,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:27,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:27,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:27,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:27,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:27,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:28,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:28,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:28,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:28,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:28,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:28,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:28,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:29,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:29,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:31,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:31,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 359 [2020-10-27 23:39:31,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:39:31,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 23:39:31,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:31,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:39:31,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-27 23:39:31,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 23:39:31,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:33,201 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 409 [2020-10-27 23:39:33,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:39:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:33,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:33,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:33,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:39:33,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:39:33,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:39:33,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:33,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:39:33,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:39:33,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:39:33,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:39:33,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952670636] [2020-10-27 23:39:33,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:39:33,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:39:33,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761548740] [2020-10-27 23:39:33,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:39:33,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:39:33,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:39:33,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:39:33,413 INFO L87 Difference]: Start difference. First operand 8695 states and 14073 transitions. Second operand 4 states. [2020-10-27 23:39:34,709 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 413 [2020-10-27 23:39:44,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:39:44,789 INFO L93 Difference]: Finished difference Result 8701 states and 14077 transitions. [2020-10-27 23:39:44,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:39:44,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 351 [2020-10-27 23:39:44,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:39:44,796 INFO L225 Difference]: With dead ends: 8701 [2020-10-27 23:39:44,796 INFO L226 Difference]: Without dead ends: 4674 [2020-10-27 23:39:44,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:39:44,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2020-10-27 23:39:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 4671. [2020-10-27 23:39:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4671 states. [2020-10-27 23:39:45,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 7607 transitions. [2020-10-27 23:39:45,076 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 7607 transitions. Word has length 351 [2020-10-27 23:39:45,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:39:45,076 INFO L481 AbstractCegarLoop]: Abstraction has 4671 states and 7607 transitions. [2020-10-27 23:39:45,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:39:45,076 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 7607 transitions. [2020-10-27 23:39:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-27 23:39:45,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:39:45,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:39:45,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:39:45,084 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:39:45,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:39:45,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1316201228, now seen corresponding path program 1 times [2020-10-27 23:39:45,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:39:45,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234721181] [2020-10-27 23:39:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:39:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:45,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:45,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:45,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:45,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:45,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:46,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:46,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:46,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:46,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:46,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:46,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:46,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:47,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:47,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:47,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:48,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking...