/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem06_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:30:00,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:30:00,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:30:00,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:30:00,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:30:00,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:30:00,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:30:00,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:30:00,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:30:00,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:30:00,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:30:00,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:30:00,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:30:00,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:30:00,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:30:00,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:30:00,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:30:00,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:30:00,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:30:00,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:30:00,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:30:00,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:30:00,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:30:00,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:30:00,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:30:00,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:30:00,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:30:00,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:30:00,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:30:00,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:30:00,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:30:00,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:30:00,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:30:00,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:30:00,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:30:00,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:30:00,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:30:00,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:30:00,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:30:00,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:30:00,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:30:00,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 16:30:00,196 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:30:00,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:30:00,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:30:00,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:30:00,202 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:30:00,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:30:00,202 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:30:00,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:30:00,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:30:00,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:30:00,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:30:00,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:30:00,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:30:00,205 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:30:00,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:30:00,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:30:00,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:30:00,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:30:00,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:30:00,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:30:00,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:30:00,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:30:00,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:30:00,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:30:00,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:30:00,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:30:00,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:30:00,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:30:00,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:30:00,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:30:00,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:30:00,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:30:00,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:30:00,679 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:30:00,680 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:30:00,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label26.c [2020-10-27 16:30:00,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84f8f46b6/0bd5ee14ea9f46f09bb78998fc4bceea/FLAG705540352 [2020-10-27 16:30:01,956 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:30:01,957 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label26.c [2020-10-27 16:30:02,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84f8f46b6/0bd5ee14ea9f46f09bb78998fc4bceea/FLAG705540352 [2020-10-27 16:30:02,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84f8f46b6/0bd5ee14ea9f46f09bb78998fc4bceea [2020-10-27 16:30:02,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:30:02,278 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:30:02,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:30:02,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:30:02,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:30:02,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:30:02" (1/1) ... [2020-10-27 16:30:02,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ac6e77a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:02, skipping insertion in model container [2020-10-27 16:30:02,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:30:02" (1/1) ... [2020-10-27 16:30:02,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:30:02,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:30:04,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:30:04,810 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:30:06,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:30:06,223 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:30:06,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:06 WrapperNode [2020-10-27 16:30:06,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:30:06,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:30:06,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:30:06,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:30:06,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:06" (1/1) ... [2020-10-27 16:30:06,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:06" (1/1) ... [2020-10-27 16:30:06,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:06" (1/1) ... [2020-10-27 16:30:06,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:06" (1/1) ... [2020-10-27 16:30:06,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:06" (1/1) ... [2020-10-27 16:30:06,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:06" (1/1) ... [2020-10-27 16:30:06,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:06" (1/1) ... [2020-10-27 16:30:06,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:30:06,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:30:06,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:30:06,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:30:06,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:30:06,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:30:06,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:30:06,984 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:30:06,984 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:30:06,984 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:30:06,985 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:30:06,985 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:30:06,985 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 16:30:06,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:30:06,985 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:30:06,986 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:30:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:30:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:30:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 16:30:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:30:06,988 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:30:06,988 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:30:06,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:30:06,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:30:06,990 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:30:06,990 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:30:06,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:30:06,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:30:06,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:30:06,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:30:06,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:30:06,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:30:15,217 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:30:15,217 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:30:15,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:30:15 BoogieIcfgContainer [2020-10-27 16:30:15,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:30:15,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:30:15,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:30:15,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:30:15,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:30:02" (1/3) ... [2020-10-27 16:30:15,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1192dfb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:30:15, skipping insertion in model container [2020-10-27 16:30:15,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:06" (2/3) ... [2020-10-27 16:30:15,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1192dfb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:30:15, skipping insertion in model container [2020-10-27 16:30:15,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:30:15" (3/3) ... [2020-10-27 16:30:15,232 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label26.c [2020-10-27 16:30:15,244 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:30:15,250 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:30:15,265 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:30:15,301 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:30:15,301 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:30:15,302 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:30:15,302 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:30:15,302 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:30:15,302 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:30:15,302 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:30:15,303 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:30:15,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-27 16:30:15,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 973 [2020-10-27 16:30:15,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:30:15,419 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] [2020-10-27 16:30:15,419 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:30:15,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:30:15,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1200464008, now seen corresponding path program 1 times [2020-10-27 16:30:15,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:30:15,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976692750] [2020-10-27 16:30:15,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:30:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:30:17,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:30:19,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:30:21,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:30:21,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 990 [2020-10-27 16:30:21,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:30:21,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5184 [2020-10-27 16:30:21,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:30:21,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 16:30:21,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:30:21,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 981 [2020-10-27 16:30:21,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 16:30:23,241 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:30:23,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:30:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:30:23,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:30:23,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:30:23,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:30:23,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:30:23,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 16:30:23,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:30:23,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:30:23,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:30:23,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:30:23,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:30:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:30:24,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976692750] [2020-10-27 16:30:24,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:30:24,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 16:30:24,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881850853] [2020-10-27 16:30:24,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 16:30:24,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:30:24,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 16:30:24,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 16:30:24,677 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 4 states. [2020-10-27 16:30:24,947 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:30:39,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:30:39,753 INFO L93 Difference]: Finished difference Result 3764 states and 7025 transitions. [2020-10-27 16:30:39,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:30:39,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 972 [2020-10-27 16:30:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:30:39,804 INFO L225 Difference]: With dead ends: 3764 [2020-10-27 16:30:39,804 INFO L226 Difference]: Without dead ends: 2381 [2020-10-27 16:30:39,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:30:39,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2020-10-27 16:30:39,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2338. [2020-10-27 16:30:39,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2338 states. [2020-10-27 16:30:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 3805 transitions. [2020-10-27 16:30:39,998 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 3805 transitions. Word has length 972 [2020-10-27 16:30:40,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:30:40,001 INFO L481 AbstractCegarLoop]: Abstraction has 2338 states and 3805 transitions. [2020-10-27 16:30:40,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 16:30:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 3805 transitions. [2020-10-27 16:30:40,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2020-10-27 16:30:40,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:30:40,044 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 16:30:40,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:30:40,044 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:30:40,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:30:40,046 INFO L82 PathProgramCache]: Analyzing trace with hash -822138759, now seen corresponding path program 1 times [2020-10-27 16:30:40,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:30:40,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903550421] [2020-10-27 16:30:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:30:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:30:40,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:30:42,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:30:45,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:30:45,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1000 [2020-10-27 16:30:45,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:30:45,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5178 [2020-10-27 16:30:45,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:30:45,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:30:45,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 16:30:45,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 978 [2020-10-27 16:30:45,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 16:30:46,373 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:30:46,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:30:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:30:46,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:30:46,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:30:46,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:30:46,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:30:46,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 16:30:46,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:30:46,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:30:46,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:30:46,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:30:46,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:30:46,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:30:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:30:46,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:30:46,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:30:46,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 16:30:46,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:30:46,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 16:30:46,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:30:46,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:30:46,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:30:46,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 16:30:46,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:30:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:30:47,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903550421] [2020-10-27 16:30:47,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:30:47,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:30:47,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963142103] [2020-10-27 16:30:47,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:30:47,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:30:47,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:30:47,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:30:47,823 INFO L87 Difference]: Start difference. First operand 2338 states and 3805 transitions. Second operand 5 states. [2020-10-27 16:30:48,110 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:31:05,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:31:05,142 INFO L93 Difference]: Finished difference Result 5772 states and 9691 transitions. [2020-10-27 16:31:05,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:31:05,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 980 [2020-10-27 16:31:05,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:31:05,172 INFO L225 Difference]: With dead ends: 5772 [2020-10-27 16:31:05,173 INFO L226 Difference]: Without dead ends: 3440 [2020-10-27 16:31:05,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:31:05,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2020-10-27 16:31:05,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3398. [2020-10-27 16:31:05,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3398 states. [2020-10-27 16:31:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3398 states to 3398 states and 5290 transitions. [2020-10-27 16:31:05,305 INFO L78 Accepts]: Start accepts. Automaton has 3398 states and 5290 transitions. Word has length 980 [2020-10-27 16:31:05,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:31:05,307 INFO L481 AbstractCegarLoop]: Abstraction has 3398 states and 5290 transitions. [2020-10-27 16:31:05,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:31:05,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3398 states and 5290 transitions. [2020-10-27 16:31:05,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 990 [2020-10-27 16:31:05,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:31:05,347 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 16:31:05,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:31:05,348 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:31:05,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:31:05,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2084462385, now seen corresponding path program 1 times [2020-10-27 16:31:05,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:31:05,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347520992] [2020-10-27 16:31:05,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:31:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:31:05,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:05,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:09,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:10,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:31:10,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1011 [2020-10-27 16:31:10,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:31:10,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5209 [2020-10-27 16:31:10,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:31:10,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:31:10,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 16:31:10,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 16:31:10,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:31:11,092 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:31:11,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:31:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:31:11,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:11,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:31:11,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:31:11,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:31:11,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 16:31:11,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:31:11,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:31:11,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:31:11,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:31:11,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:31:11,325 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:31:11,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:31:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:31:11,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:11,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:31:11,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 16:31:11,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:31:11,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 16:31:11,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:31:11,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:31:11,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:31:11,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 16:31:11,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:31:11,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-27 16:31:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:31:11,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:11,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:31:11,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 16:31:11,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:31:11,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 16:31:11,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:31:11,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:31:11,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:31:11,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 16:31:11,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:31:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 16:31:11,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347520992] [2020-10-27 16:31:11,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:31:11,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 16:31:11,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445412310] [2020-10-27 16:31:11,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:31:11,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:31:11,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:31:11,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:31:11,981 INFO L87 Difference]: Start difference. First operand 3398 states and 5290 transitions. Second operand 7 states. [2020-10-27 16:31:12,286 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:31:12,657 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:31:42,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:31:42,078 INFO L93 Difference]: Finished difference Result 13301 states and 21344 transitions. [2020-10-27 16:31:42,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 16:31:42,078 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 989 [2020-10-27 16:31:42,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:31:42,135 INFO L225 Difference]: With dead ends: 13301 [2020-10-27 16:31:42,135 INFO L226 Difference]: Without dead ends: 9909 [2020-10-27 16:31:42,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 16:31:42,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9909 states. [2020-10-27 16:31:42,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9909 to 9840. [2020-10-27 16:31:42,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9840 states. [2020-10-27 16:31:42,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9840 states to 9840 states and 13852 transitions. [2020-10-27 16:31:42,462 INFO L78 Accepts]: Start accepts. Automaton has 9840 states and 13852 transitions. Word has length 989 [2020-10-27 16:31:42,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:31:42,463 INFO L481 AbstractCegarLoop]: Abstraction has 9840 states and 13852 transitions. [2020-10-27 16:31:42,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 16:31:42,463 INFO L276 IsEmpty]: Start isEmpty. Operand 9840 states and 13852 transitions. [2020-10-27 16:31:42,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 990 [2020-10-27 16:31:42,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:31:42,515 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-10-27 16:31:42,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:31:42,515 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:31:42,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:31:42,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1206675650, now seen corresponding path program 1 times [2020-10-27 16:31:42,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:31:42,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737264342] [2020-10-27 16:31:42,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:31:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:31:42,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:44,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:47,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:31:47,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1009 [2020-10-27 16:31:47,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:31:47,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5177 [2020-10-27 16:31:47,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:31:47,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:31:47,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 16:31:47,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 978 [2020-10-27 16:31:47,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:31:48,911 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:31:48,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:31:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:31:48,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:48,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:31:48,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:31:48,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:31:48,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 16:31:48,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:31:48,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:31:48,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:31:48,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:31:48,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:31:49,174 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:31:49,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:31:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:31:49,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:49,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:31:49,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 16:31:49,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:31:49,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 16:31:49,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:31:49,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:31:49,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:31:49,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 16:31:49,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:31:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:31:50,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737264342] [2020-10-27 16:31:50,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:31:50,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:31:50,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809541123] [2020-10-27 16:31:50,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:31:50,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:31:50,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:31:50,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:31:50,974 INFO L87 Difference]: Start difference. First operand 9840 states and 13852 transitions. Second operand 5 states. [2020-10-27 16:31:51,328 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 16:32:10,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:32:10,433 INFO L93 Difference]: Finished difference Result 29130 states and 42581 transitions. [2020-10-27 16:32:10,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:32:10,434 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 989 [2020-10-27 16:32:10,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:32:10,608 INFO L225 Difference]: With dead ends: 29130 [2020-10-27 16:32:10,608 INFO L226 Difference]: Without dead ends: 19296 [2020-10-27 16:32:10,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:32:10,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19296 states. [2020-10-27 16:32:11,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19296 to 19280. [2020-10-27 16:32:11,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19280 states. [2020-10-27 16:32:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19280 states to 19280 states and 26945 transitions. [2020-10-27 16:32:11,221 INFO L78 Accepts]: Start accepts. Automaton has 19280 states and 26945 transitions. Word has length 989 [2020-10-27 16:32:11,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:32:11,223 INFO L481 AbstractCegarLoop]: Abstraction has 19280 states and 26945 transitions. [2020-10-27 16:32:11,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:32:11,223 INFO L276 IsEmpty]: Start isEmpty. Operand 19280 states and 26945 transitions. [2020-10-27 16:32:11,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 992 [2020-10-27 16:32:11,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:32:11,304 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 16:32:11,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 16:32:11,305 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:32:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:32:11,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1191835838, now seen corresponding path program 1 times [2020-10-27 16:32:11,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:32:11,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596001444] [2020-10-27 16:32:11,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:32:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:32:11,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:13,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:16,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:32:16,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1011 [2020-10-27 16:32:16,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:32:16,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-27 16:32:16,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:32:16,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:32:16,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 16:32:16,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 978 [2020-10-27 16:32:16,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:32:17,406 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:32:17,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:32:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:32:17,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:17,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:32:17,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:32:17,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:32:17,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 16:32:17,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:32:17,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:32:17,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:32:17,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:32:17,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:32:17,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:32:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:32:17,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:17,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:32:17,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 16:32:17,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:32:17,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 16:32:17,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:32:17,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:32:17,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:32:17,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 16:32:17,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:32:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:32:18,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596001444] [2020-10-27 16:32:18,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:32:18,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:32:18,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849675534] [2020-10-27 16:32:18,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:32:18,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:32:18,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:32:18,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:32:18,686 INFO L87 Difference]: Start difference. First operand 19280 states and 26945 transitions. Second operand 5 states. [2020-10-27 16:32:19,061 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:32:39,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:32:39,061 INFO L93 Difference]: Finished difference Result 44901 states and 65496 transitions. [2020-10-27 16:32:39,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:32:39,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 991 [2020-10-27 16:32:39,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:32:39,160 INFO L225 Difference]: With dead ends: 44901 [2020-10-27 16:32:39,160 INFO L226 Difference]: Without dead ends: 25627 [2020-10-27 16:32:39,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:32:39,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25627 states. [2020-10-27 16:32:39,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25627 to 25543. [2020-10-27 16:32:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25543 states. [2020-10-27 16:32:39,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25543 states to 25543 states and 36217 transitions. [2020-10-27 16:32:39,924 INFO L78 Accepts]: Start accepts. Automaton has 25543 states and 36217 transitions. Word has length 991 [2020-10-27 16:32:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:32:39,926 INFO L481 AbstractCegarLoop]: Abstraction has 25543 states and 36217 transitions. [2020-10-27 16:32:39,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:32:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 25543 states and 36217 transitions. [2020-10-27 16:32:40,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1008 [2020-10-27 16:32:40,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:32:40,023 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 16:32:40,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 16:32:40,023 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:32:40,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:32:40,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2074623409, now seen corresponding path program 1 times [2020-10-27 16:32:40,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:32:40,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547710566] [2020-10-27 16:32:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:32:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:32:40,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:40,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:41,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:45,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:32:45,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1029 [2020-10-27 16:32:45,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:32:45,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5131 [2020-10-27 16:32:45,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:32:45,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 16:32:45,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:32:45,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 16:32:45,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:32:45,617 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:32:45,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:32:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:32:45,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:45,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:32:45,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:32:45,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:32:45,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 16:32:45,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:32:45,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:32:45,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:32:45,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:32:45,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:32:45,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:32:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:32:45,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:45,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:45,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:32:45,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 16:32:45,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:32:45,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-27 16:32:45,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:32:45,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:32:45,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:32:45,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 16:32:45,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:32:45,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 16:32:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:32:45,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:45,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:32:45,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 16:32:45,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:32:45,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 16:32:45,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:32:45,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:32:45,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:32:45,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 16:32:45,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:32:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 16:32:46,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547710566] [2020-10-27 16:32:46,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:32:46,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 16:32:46,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912561556] [2020-10-27 16:32:46,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 16:32:46,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:32:46,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 16:32:46,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 16:32:46,638 INFO L87 Difference]: Start difference. First operand 25543 states and 36217 transitions. Second operand 8 states. [2020-10-27 16:32:46,875 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:32:47,456 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:33:06,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:33:06,398 INFO L93 Difference]: Finished difference Result 51794 states and 80874 transitions. [2020-10-27 16:33:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 16:33:06,399 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1007 [2020-10-27 16:33:06,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:33:06,520 INFO L225 Difference]: With dead ends: 51794 [2020-10-27 16:33:06,521 INFO L226 Difference]: Without dead ends: 26289 [2020-10-27 16:33:06,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2020-10-27 16:33:06,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26289 states. [2020-10-27 16:33:07,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26289 to 25980. [2020-10-27 16:33:07,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25980 states. [2020-10-27 16:33:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25980 states to 25980 states and 37265 transitions. [2020-10-27 16:33:07,432 INFO L78 Accepts]: Start accepts. Automaton has 25980 states and 37265 transitions. Word has length 1007 [2020-10-27 16:33:07,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:33:07,433 INFO L481 AbstractCegarLoop]: Abstraction has 25980 states and 37265 transitions. [2020-10-27 16:33:07,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 16:33:07,433 INFO L276 IsEmpty]: Start isEmpty. Operand 25980 states and 37265 transitions. [2020-10-27 16:33:07,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1010 [2020-10-27 16:33:07,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:33:07,513 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 16:33:07,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 16:33:07,514 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:33:07,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:33:07,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1741963492, now seen corresponding path program 1 times [2020-10-27 16:33:07,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:33:07,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844295263] [2020-10-27 16:33:07,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:33:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:33:07,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:07,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:12,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:12,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:33:12,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1031 [2020-10-27 16:33:12,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:33:12,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 16:33:12,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:33:12,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:33:12,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 16:33:12,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 16:33:12,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:33:13,022 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:33:13,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:33:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:33:13,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:13,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:33:13,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:33:13,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:33:13,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 16:33:13,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:33:13,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:33:13,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:33:13,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:33:13,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:33:13,157 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:33:13,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:33:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:33:13,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:13,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:33:13,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 16:33:13,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:33:13,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 16:33:13,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:33:13,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:33:13,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:33:13,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 16:33:13,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:33:13,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-27 16:33:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:33:13,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:13,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:33:13,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 16:33:13,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:33:13,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 16:33:13,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:33:13,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:33:13,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:33:13,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 16:33:13,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:33:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 16:33:13,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844295263] [2020-10-27 16:33:13,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:33:13,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 16:33:13,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015106577] [2020-10-27 16:33:13,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:33:13,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:33:13,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:33:13,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:33:13,750 INFO L87 Difference]: Start difference. First operand 25980 states and 37265 transitions. Second operand 7 states. [2020-10-27 16:33:14,089 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:33:15,008 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 159