/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem06_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:31:33,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:31:33,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:31:34,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:31:34,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:31:34,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:31:34,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:31:34,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:31:34,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:31:34,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:31:34,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:31:34,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:31:34,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:31:34,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:31:34,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:31:34,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:31:34,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:31:34,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:31:34,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:31:34,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:31:34,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:31:34,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:31:34,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:31:34,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:31:34,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:31:34,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:31:34,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:31:34,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:31:34,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:31:34,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:31:34,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:31:34,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:31:34,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:31:34,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:31:34,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:31:34,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:31:34,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:31:34,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:31:34,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:31:34,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:31:34,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:31:34,086 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 [2020-10-26 21:31:34,138 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:31:34,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:31:34,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:31:34,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:31:34,140 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:31:34,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:31:34,141 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:31:34,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:31:34,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:31:34,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:31:34,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:31:34,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:31:34,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:31:34,146 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:31:34,147 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:31:34,147 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:31:34,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:31:34,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:31:34,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:31:34,148 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:31:34,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:31:34,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:31:34,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:31:34,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:31:34,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:31:34,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:31:34,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:31:34,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:31:34,149 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:31:34,150 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:31:34,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:31:34,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:31:34,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:31:34,604 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:31:34,608 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:31:34,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label17.c [2020-10-26 21:31:34,705 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdcba7f70/7ca20855b249484fb5ea650208375ed8/FLAG0ac9e0782 [2020-10-26 21:31:36,076 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:31:36,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label17.c [2020-10-26 21:31:36,159 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdcba7f70/7ca20855b249484fb5ea650208375ed8/FLAG0ac9e0782 [2020-10-26 21:31:36,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdcba7f70/7ca20855b249484fb5ea650208375ed8 [2020-10-26 21:31:36,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:31:36,286 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:31:36,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:31:36,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:31:36,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:31:36,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:31:36" (1/1) ... [2020-10-26 21:31:36,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e0f3dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:31:36, skipping insertion in model container [2020-10-26 21:31:36,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:31:36" (1/1) ... [2020-10-26 21:31:36,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:31:36,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:31:38,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:31:38,545 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:31:39,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:31:39,807 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:31:39,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:31:39 WrapperNode [2020-10-26 21:31:39,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:31:39,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:31:39,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:31:39,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:31:39,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:31:39" (1/1) ... [2020-10-26 21:31:39,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:31:39" (1/1) ... [2020-10-26 21:31:39,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:31:39" (1/1) ... [2020-10-26 21:31:39,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:31:39" (1/1) ... [2020-10-26 21:31:40,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:31:39" (1/1) ... [2020-10-26 21:31:40,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:31:39" (1/1) ... [2020-10-26 21:31:40,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:31:39" (1/1) ... [2020-10-26 21:31:40,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:31:40,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:31:40,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:31:40,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:31:40,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:31:39" (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 [2020-10-26 21:31:40,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:31:40,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:31:40,586 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:31:40,586 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:31:40,586 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:31:40,586 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:31:40,587 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:31:40,588 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:31:40,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:31:40,588 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:31:40,589 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:31:40,589 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:31:40,589 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:31:40,590 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:31:40,590 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:31:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:31:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:31:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:31:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:31:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:31:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:31:40,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:31:40,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:31:40,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:31:40,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:31:40,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:31:40,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:31:48,973 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:31:48,973 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:31:48,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:31:48 BoogieIcfgContainer [2020-10-26 21:31:48,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:31:48,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:31:48,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:31:48,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:31:48,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:31:36" (1/3) ... [2020-10-26 21:31:48,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b578976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:31:48, skipping insertion in model container [2020-10-26 21:31:48,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:31:39" (2/3) ... [2020-10-26 21:31:48,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b578976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:31:48, skipping insertion in model container [2020-10-26 21:31:48,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:31:48" (3/3) ... [2020-10-26 21:31:48,990 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label17.c [2020-10-26 21:31:49,003 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:31:49,014 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:31:49,028 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:31:49,076 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:31:49,077 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:31:49,077 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:31:49,077 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:31:49,077 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:31:49,077 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:31:49,078 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:31:49,078 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:31:49,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-26 21:31:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 984 [2020-10-26 21:31:49,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:31:49,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:31:49,222 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:31:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:31:49,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1410836412, now seen corresponding path program 1 times [2020-10-26 21:31:49,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:31:49,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755578647] [2020-10-26 21:31:49,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:31:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:31:51,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:31:52,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:31:55,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:31:55,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1001 [2020-10-26 21:31:55,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:31:55,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5165 [2020-10-26 21:31:55,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:31:55,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 21:31:55,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:31:55,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 992 [2020-10-26 21:31:55,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 21:31:57,213 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:31:57,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:31:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:31:57,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:31:57,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:31:57,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:31:57,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:31:57,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-26 21:31:57,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:31:57,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:31:57,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:31:57,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:31:57,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:31:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:31:58,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755578647] [2020-10-26 21:31:58,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:31:58,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 21:31:58,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020740995] [2020-10-26 21:31:58,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 21:31:58,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:31:58,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 21:31:58,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 21:31:58,826 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 4 states. [2020-10-26 21:31:59,126 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:32:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:32:16,777 INFO L93 Difference]: Finished difference Result 3750 states and 6993 transitions. [2020-10-26 21:32:16,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 21:32:16,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 983 [2020-10-26 21:32:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:32:16,829 INFO L225 Difference]: With dead ends: 3750 [2020-10-26 21:32:16,829 INFO L226 Difference]: Without dead ends: 2367 [2020-10-26 21:32:16,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 21:32:16,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2020-10-26 21:32:17,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 2346. [2020-10-26 21:32:17,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2346 states. [2020-10-26 21:32:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3865 transitions. [2020-10-26 21:32:17,064 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3865 transitions. Word has length 983 [2020-10-26 21:32:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:32:17,069 INFO L481 AbstractCegarLoop]: Abstraction has 2346 states and 3865 transitions. [2020-10-26 21:32:17,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 21:32:17,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3865 transitions. [2020-10-26 21:32:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 996 [2020-10-26 21:32:17,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:32:17,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:32:17,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:32:17,126 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:32:17,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:32:17,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1601489515, now seen corresponding path program 1 times [2020-10-26 21:32:17,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:32:17,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138320148] [2020-10-26 21:32:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:32:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:17,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:19,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:22,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:22,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1015 [2020-10-26 21:32:22,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:32:22,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 21:32:22,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:22,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:32:22,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:32:22,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 21:32:22,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 21:32:22,872 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:32:22,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:32:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:22,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:22,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:22,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:32:22,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:32:22,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 21:32:22,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:22,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:32:22,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:32:22,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:32:22,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:32:23,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:32:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:23,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:23,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:23,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 21:32:23,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:32:23,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 21:32:23,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:23,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:32:23,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:32:23,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 21:32:23,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:32:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:32:23,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138320148] [2020-10-26 21:32:23,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:32:23,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:32:23,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675705214] [2020-10-26 21:32:23,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:32:23,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:32:23,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:32:23,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:32:23,786 INFO L87 Difference]: Start difference. First operand 2346 states and 3865 transitions. Second operand 7 states. [2020-10-26 21:32:24,165 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 21:32:25,441 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 21:32:47,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:32:47,177 INFO L93 Difference]: Finished difference Result 6964 states and 11559 transitions. [2020-10-26 21:32:47,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:32:47,178 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 995 [2020-10-26 21:32:47,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:32:47,204 INFO L225 Difference]: With dead ends: 6964 [2020-10-26 21:32:47,204 INFO L226 Difference]: Without dead ends: 4624 [2020-10-26 21:32:47,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:32:47,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4624 states. [2020-10-26 21:32:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4624 to 4507. [2020-10-26 21:32:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4507 states. [2020-10-26 21:32:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4507 states to 4507 states and 6523 transitions. [2020-10-26 21:32:47,383 INFO L78 Accepts]: Start accepts. Automaton has 4507 states and 6523 transitions. Word has length 995 [2020-10-26 21:32:47,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:32:47,384 INFO L481 AbstractCegarLoop]: Abstraction has 4507 states and 6523 transitions. [2020-10-26 21:32:47,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:32:47,384 INFO L276 IsEmpty]: Start isEmpty. Operand 4507 states and 6523 transitions. [2020-10-26 21:32:47,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1009 [2020-10-26 21:32:47,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:32:47,405 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:32:47,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:32:47,405 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:32:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:32:47,406 INFO L82 PathProgramCache]: Analyzing trace with hash 654988505, now seen corresponding path program 1 times [2020-10-26 21:32:47,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:32:47,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125868268] [2020-10-26 21:32:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:32:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:47,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:47,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:50,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:52,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:52,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1030 [2020-10-26 21:32:52,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:32:52,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-26 21:32:52,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:32:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:32:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 21:32:52,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:32:53,538 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:32:53,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:32:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:53,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:53,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:53,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:32:53,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:32:53,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 21:32:53,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:53,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:32:53,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:32:53,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:32:53,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:32:53,706 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:32:53,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:32:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:53,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:53,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:53,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 21:32:53,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:32:53,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-26 21:32:53,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:32:53,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:32:53,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 21:32:53,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:32:53,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 21:32:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:53,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:53,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:53,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 21:32:53,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:32:53,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 21:32:53,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:53,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:32:53,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-26 21:32:53,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:32:53,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:32:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 21:32:54,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125868268] [2020-10-26 21:32:54,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:32:54,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:32:54,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296012446] [2020-10-26 21:32:54,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:32:54,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:32:54,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:32:54,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:32:54,854 INFO L87 Difference]: Start difference. First operand 4507 states and 6523 transitions. Second operand 7 states. [2020-10-26 21:32:55,146 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 21:32:56,493 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-26 21:33:17,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:33:17,465 INFO L93 Difference]: Finished difference Result 13669 states and 20033 transitions. [2020-10-26 21:33:17,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:33:17,466 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1008 [2020-10-26 21:33:17,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:33:17,516 INFO L225 Difference]: With dead ends: 13669 [2020-10-26 21:33:17,516 INFO L226 Difference]: Without dead ends: 9168 [2020-10-26 21:33:17,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:33:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9168 states. [2020-10-26 21:33:17,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9168 to 8966. [2020-10-26 21:33:17,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8966 states. [2020-10-26 21:33:17,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8966 states to 8966 states and 12483 transitions. [2020-10-26 21:33:17,820 INFO L78 Accepts]: Start accepts. Automaton has 8966 states and 12483 transitions. Word has length 1008 [2020-10-26 21:33:17,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:33:17,820 INFO L481 AbstractCegarLoop]: Abstraction has 8966 states and 12483 transitions. [2020-10-26 21:33:17,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:33:17,820 INFO L276 IsEmpty]: Start isEmpty. Operand 8966 states and 12483 transitions. [2020-10-26 21:33:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2020-10-26 21:33:17,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:33:17,859 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:33:17,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:33:17,859 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:33:17,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:33:17,860 INFO L82 PathProgramCache]: Analyzing trace with hash -466496743, now seen corresponding path program 1 times [2020-10-26 21:33:17,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:33:17,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683908564] [2020-10-26 21:33:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:33:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:18,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:18,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:23,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:23,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1045 [2020-10-26 21:33:23,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:33:23,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5183 [2020-10-26 21:33:23,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:23,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:33:23,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:33:23,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 21:33:23,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:23,669 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:33:23,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:33:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:23,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:23,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:23,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:33:23,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:33:23,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 21:33:23,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:23,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:33:23,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:33:23,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:33:23,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 21:33:23,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:33:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:23,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:23,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:23,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 21:33:23,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:33:23,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 21:33:23,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:23,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:33:23,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:33:23,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 21:33:23,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:24,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 21:33:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:24,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:24,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:24,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 21:33:24,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:33:24,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 21:33:24,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:24,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:33:24,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-26 21:33:24,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:33:24,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 21:33:24,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683908564] [2020-10-26 21:33:24,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:33:24,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:33:24,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875974827] [2020-10-26 21:33:24,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:33:24,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:33:24,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:33:24,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:33:24,704 INFO L87 Difference]: Start difference. First operand 8966 states and 12483 transitions. Second operand 7 states. [2020-10-26 21:33:24,961 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:33:26,341 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 21:33:45,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:33:45,546 INFO L93 Difference]: Finished difference Result 27032 states and 38652 transitions. [2020-10-26 21:33:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 21:33:45,547 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1023 [2020-10-26 21:33:45,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:33:45,636 INFO L225 Difference]: With dead ends: 27032 [2020-10-26 21:33:45,636 INFO L226 Difference]: Without dead ends: 18072 [2020-10-26 21:33:45,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:33:45,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18072 states. [2020-10-26 21:33:46,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18072 to 17917. [2020-10-26 21:33:46,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17917 states. [2020-10-26 21:33:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17917 states to 17917 states and 24222 transitions. [2020-10-26 21:33:46,187 INFO L78 Accepts]: Start accepts. Automaton has 17917 states and 24222 transitions. Word has length 1023 [2020-10-26 21:33:46,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:33:46,188 INFO L481 AbstractCegarLoop]: Abstraction has 17917 states and 24222 transitions. [2020-10-26 21:33:46,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:33:46,188 INFO L276 IsEmpty]: Start isEmpty. Operand 17917 states and 24222 transitions. [2020-10-26 21:33:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1052 [2020-10-26 21:33:46,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:33:46,251 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:33:46,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 21:33:46,251 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:33:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:33:46,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1807412767, now seen corresponding path program 1 times [2020-10-26 21:33:46,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:33:46,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148042372] [2020-10-26 21:33:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:33:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:46,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:48,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:50,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:51,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:51,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1073 [2020-10-26 21:33:51,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:33:51,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5221 [2020-10-26 21:33:51,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:51,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:33:51,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:33:51,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 21:33:51,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:52,097 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:33:52,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:33:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:52,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:52,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:52,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:33:52,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:33:52,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 21:33:52,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:52,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:33:52,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:33:52,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:33:52,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:52,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:33:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:52,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:52,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:52,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 21:33:52,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:33:52,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 21:33:52,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:52,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:33:52,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:33:52,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-26 21:33:52,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:52,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 21:33:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:52,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:52,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:52,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-26 21:33:52,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:33:52,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 21:33:52,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:52,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:33:52,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:33:52,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 21:33:52,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 76 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 21:33:53,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148042372] [2020-10-26 21:33:53,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:33:53,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:33:53,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640011210] [2020-10-26 21:33:53,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:33:53,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:33:53,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:33:53,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:33:53,289 INFO L87 Difference]: Start difference. First operand 17917 states and 24222 transitions. Second operand 8 states. [2020-10-26 21:33:53,552 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:33:55,121 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:34:14,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:34:14,690 INFO L93 Difference]: Finished difference Result 46406 states and 66235 transitions. [2020-10-26 21:34:14,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 21:34:14,691 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1051 [2020-10-26 21:34:14,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:34:14,789 INFO L225 Difference]: With dead ends: 46406 [2020-10-26 21:34:14,789 INFO L226 Difference]: Without dead ends: 28495 [2020-10-26 21:34:14,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 21:34:14,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28495 states. [2020-10-26 21:34:15,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28495 to 27516. [2020-10-26 21:34:15,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27516 states. [2020-10-26 21:34:15,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27516 states to 27516 states and 37292 transitions. [2020-10-26 21:34:15,607 INFO L78 Accepts]: Start accepts. Automaton has 27516 states and 37292 transitions. Word has length 1051 [2020-10-26 21:34:15,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:34:15,608 INFO L481 AbstractCegarLoop]: Abstraction has 27516 states and 37292 transitions. [2020-10-26 21:34:15,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:34:15,608 INFO L276 IsEmpty]: Start isEmpty. Operand 27516 states and 37292 transitions. [2020-10-26 21:34:15,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1054 [2020-10-26 21:34:15,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:34:15,705 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:34:15,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 21:34:15,706 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:34:15,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:34:15,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1872040539, now seen corresponding path program 1 times [2020-10-26 21:34:15,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:34:15,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078288742] [2020-10-26 21:34:15,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:34:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:15,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:17,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:21,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:21,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1073 [2020-10-26 21:34:21,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:34:21,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5231 [2020-10-26 21:34:21,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:21,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:34:21,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:34:21,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 21:34:21,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:21,565 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:34:21,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:34:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:21,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:21,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:21,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:34:21,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:21,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 21:34:21,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:34:21,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:34:21,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:34:21,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:21,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:34:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:21,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:21,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:21,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 21:34:21,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:21,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-26 21:34:21,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:21,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:34:21,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:34:21,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 21:34:21,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:34:22,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078288742] [2020-10-26 21:34:22,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:34:22,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:34:22,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545031687] [2020-10-26 21:34:22,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:34:22,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:34:22,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:34:22,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:34:22,846 INFO L87 Difference]: Start difference. First operand 27516 states and 37292 transitions. Second operand 7 states. [2020-10-26 21:34:23,148 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 21:34:24,679 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-26 21:34:47,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:34:47,367 INFO L93 Difference]: Finished difference Result 67101 states and 91804 transitions. [2020-10-26 21:34:47,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:34:47,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1053 [2020-10-26 21:34:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:34:47,508 INFO L225 Difference]: With dead ends: 67101 [2020-10-26 21:34:47,508 INFO L226 Difference]: Without dead ends: 39591 [2020-10-26 21:34:47,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:34:47,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39591 states. [2020-10-26 21:34:48,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39591 to 38684. [2020-10-26 21:34:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38684 states. [2020-10-26 21:34:48,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38684 states to 38684 states and 52210 transitions. [2020-10-26 21:34:48,692 INFO L78 Accepts]: Start accepts. Automaton has 38684 states and 52210 transitions. Word has length 1053 [2020-10-26 21:34:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:34:48,693 INFO L481 AbstractCegarLoop]: Abstraction has 38684 states and 52210 transitions. [2020-10-26 21:34:48,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:34:48,693 INFO L276 IsEmpty]: Start isEmpty. Operand 38684 states and 52210 transitions. [2020-10-26 21:34:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1059 [2020-10-26 21:34:48,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:34:48,789 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:34:48,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 21:34:48,789 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:34:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:34:48,790 INFO L82 PathProgramCache]: Analyzing trace with hash -542756239, now seen corresponding path program 1 times [2020-10-26 21:34:48,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:34:48,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037489979] [2020-10-26 21:34:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:34:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:48,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:49,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:50,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:54,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:54,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1080 [2020-10-26 21:34:54,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:34:54,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5149 [2020-10-26 21:34:54,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:54,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:34:54,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:34:54,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 21:34:54,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:54,623 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:34:54,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:34:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:54,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:54,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:54,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:34:54,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:54,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 21:34:54,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:54,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:34:54,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:34:54,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:34:54,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:54,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:34:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:54,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:54,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:54,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 21:34:54,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:54,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-26 21:34:54,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:54,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:34:54,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:34:54,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-26 21:34:54,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:54,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 21:34:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:54,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:55,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:55,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 21:34:55,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:55,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 21:34:55,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:55,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:34:55,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:34:55,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 21:34:55,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-26 21:34:55,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037489979] [2020-10-26 21:34:55,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:34:55,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 21:34:55,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096290621] [2020-10-26 21:34:55,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:34:55,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:34:55,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:34:55,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:34:55,715 INFO L87 Difference]: Start difference. First operand 38684 states and 52210 transitions. Second operand 7 states. [2020-10-26 21:34:55,977 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 21:34:57,477 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 162