/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem06_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 11:02:46,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 11:02:46,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 11:02:46,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 11:02:46,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 11:02:46,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 11:02:46,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 11:02:46,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 11:02:46,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 11:02:46,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 11:02:46,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 11:02:46,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 11:02:46,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 11:02:46,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 11:02:46,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 11:02:46,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 11:02:46,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 11:02:46,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 11:02:46,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 11:02:46,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 11:02:46,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 11:02:46,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 11:02:46,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 11:02:46,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 11:02:46,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 11:02:46,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 11:02:46,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 11:02:46,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 11:02:46,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 11:02:46,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 11:02:46,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 11:02:46,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 11:02:46,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 11:02:46,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 11:02:46,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 11:02:46,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 11:02:46,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 11:02:46,165 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 11:02:46,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 11:02:46,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 11:02:46,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 11:02:46,168 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 11:02:46,193 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 11:02:46,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 11:02:46,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 11:02:46,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 11:02:46,195 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 11:02:46,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 11:02:46,196 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 11:02:46,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 11:02:46,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 11:02:46,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 11:02:46,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 11:02:46,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 11:02:46,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 11:02:46,197 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 11:02:46,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 11:02:46,197 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 11:02:46,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 11:02:46,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 11:02:46,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 11:02:46,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 11:02:46,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 11:02:46,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 11:02:46,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 11:02:46,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 11:02:46,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 11:02:46,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 11:02:46,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 11:02:46,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 11:02:46,200 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 11:02:46,200 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 11:02:46,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 11:02:46,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 11:02:46,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 11:02:46,621 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 11:02:46,622 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 11:02:46,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label32.c [2020-10-28 11:02:46,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a1f498f6a/1fafe33f46254de5b310a18eb41bae4b/FLAG07f040255 [2020-10-28 11:02:47,983 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 11:02:47,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label32.c [2020-10-28 11:02:48,032 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a1f498f6a/1fafe33f46254de5b310a18eb41bae4b/FLAG07f040255 [2020-10-28 11:02:48,324 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a1f498f6a/1fafe33f46254de5b310a18eb41bae4b [2020-10-28 11:02:48,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 11:02:48,337 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 11:02:48,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 11:02:48,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 11:02:48,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 11:02:48,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:02:48" (1/1) ... [2020-10-28 11:02:48,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17a732a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:02:48, skipping insertion in model container [2020-10-28 11:02:48,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:02:48" (1/1) ... [2020-10-28 11:02:48,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 11:02:48,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 11:02:50,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 11:02:50,738 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 11:02:51,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 11:02:51,933 INFO L208 MainTranslator]: Completed translation [2020-10-28 11:02:51,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:02:51 WrapperNode [2020-10-28 11:02:51,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 11:02:51,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 11:02:51,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 11:02:51,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 11:02:51,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:02:51" (1/1) ... [2020-10-28 11:02:51,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:02:51" (1/1) ... [2020-10-28 11:02:52,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:02:51" (1/1) ... [2020-10-28 11:02:52,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:02:51" (1/1) ... [2020-10-28 11:02:52,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:02:51" (1/1) ... [2020-10-28 11:02:52,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:02:51" (1/1) ... [2020-10-28 11:02:52,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:02:51" (1/1) ... [2020-10-28 11:02:52,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 11:02:52,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 11:02:52,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 11:02:52,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 11:02:52,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:02:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 11:02:52,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 11:02:52,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 11:02:52,513 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 11:02:52,513 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 11:02:52,513 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 11:02:52,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 11:02:52,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 11:02:52,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 11:02:52,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 11:02:52,514 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 11:02:52,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 11:02:52,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 11:02:52,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 11:02:52,516 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 11:02:52,516 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 11:02:52,517 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 11:02:52,517 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 11:02:52,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 11:02:52,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 11:02:52,517 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 11:02:52,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 11:02:52,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 11:02:52,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 11:02:52,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 11:02:52,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 11:02:52,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 11:02:52,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 11:03:04,088 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 11:03:04,088 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 11:03:04,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:03:04 BoogieIcfgContainer [2020-10-28 11:03:04,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 11:03:04,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 11:03:04,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 11:03:04,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 11:03:04,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:02:48" (1/3) ... [2020-10-28 11:03:04,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6579fc3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:03:04, skipping insertion in model container [2020-10-28 11:03:04,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:02:51" (2/3) ... [2020-10-28 11:03:04,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6579fc3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:03:04, skipping insertion in model container [2020-10-28 11:03:04,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:03:04" (3/3) ... [2020-10-28 11:03:04,106 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label32.c [2020-10-28 11:03:04,119 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 11:03:04,126 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 11:03:04,140 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 11:03:04,186 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 11:03:04,187 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 11:03:04,187 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 11:03:04,187 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 11:03:04,187 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 11:03:04,187 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 11:03:04,188 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 11:03:04,188 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 11:03:04,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-28 11:03:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 979 [2020-10-28 11:03:04,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:03:04,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:03:04,317 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:03:04,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:03:04,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1066616592, now seen corresponding path program 1 times [2020-10-28 11:03:04,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:03:04,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487668630] [2020-10-28 11:03:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:03:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:06,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:09,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:10,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:10,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 996 [2020-10-28 11:03:10,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:03:10,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5182 [2020-10-28 11:03:10,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:10,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:10,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 11:03:10,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:03:10,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 987 [2020-10-28 11:03:10,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 11:03:12,344 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:03:12,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:03:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:12,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:12,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:12,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:03:12,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:03:12,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 11:03:12,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:12,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:12,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:03:12,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:03:12,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:03:12,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:03:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:03:13,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487668630] [2020-10-28 11:03:13,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:03:13,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 11:03:13,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583700683] [2020-10-28 11:03:13,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 11:03:13,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:03:13,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 11:03:13,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 11:03:13,557 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 4 states. [2020-10-28 11:03:14,086 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:03:37,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:03:37,031 INFO L93 Difference]: Finished difference Result 3770 states and 7012 transitions. [2020-10-28 11:03:37,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 11:03:37,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 978 [2020-10-28 11:03:37,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:03:37,084 INFO L225 Difference]: With dead ends: 3770 [2020-10-28 11:03:37,085 INFO L226 Difference]: Without dead ends: 2387 [2020-10-28 11:03:37,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 11:03:37,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2020-10-28 11:03:37,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2374. [2020-10-28 11:03:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2374 states. [2020-10-28 11:03:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 3972 transitions. [2020-10-28 11:03:37,297 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 3972 transitions. Word has length 978 [2020-10-28 11:03:37,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:03:37,301 INFO L481 AbstractCegarLoop]: Abstraction has 2374 states and 3972 transitions. [2020-10-28 11:03:37,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 11:03:37,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 3972 transitions. [2020-10-28 11:03:37,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 991 [2020-10-28 11:03:37,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:03:37,345 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:03:37,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 11:03:37,345 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:03:37,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:03:37,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1295243401, now seen corresponding path program 1 times [2020-10-28 11:03:37,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:03:37,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652362321] [2020-10-28 11:03:37,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:03:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:37,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:40,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:42,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:42,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1010 [2020-10-28 11:03:42,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:03:42,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-28 11:03:42,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:42,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:42,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:03:42,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:03:42,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 11:03:42,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:43,434 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:03:43,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:03:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:43,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:43,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:43,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:03:43,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:03:43,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 11:03:43,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:43,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:43,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:03:43,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:03:43,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:03:43,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:03:43,637 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 11:03:43,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:03:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:43,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:43,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:43,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:03:43,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:03:43,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 11:03:43,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:43,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:03:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:03:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 11:03:43,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:03:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:03:44,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652362321] [2020-10-28 11:03:44,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:03:44,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 11:03:44,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134933427] [2020-10-28 11:03:44,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:03:44,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:03:44,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:03:44,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:03:44,296 INFO L87 Difference]: Start difference. First operand 2374 states and 3972 transitions. Second operand 7 states. [2020-10-28 11:03:44,771 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:03:46,563 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:04:14,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:04:14,353 INFO L93 Difference]: Finished difference Result 7015 states and 11835 transitions. [2020-10-28 11:04:14,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 11:04:14,354 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 990 [2020-10-28 11:04:14,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:04:14,387 INFO L225 Difference]: With dead ends: 7015 [2020-10-28 11:04:14,387 INFO L226 Difference]: Without dead ends: 4647 [2020-10-28 11:04:14,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:04:14,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4647 states. [2020-10-28 11:04:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4647 to 4581. [2020-10-28 11:04:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4581 states. [2020-10-28 11:04:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 7051 transitions. [2020-10-28 11:04:14,574 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 7051 transitions. Word has length 990 [2020-10-28 11:04:14,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:04:14,575 INFO L481 AbstractCegarLoop]: Abstraction has 4581 states and 7051 transitions. [2020-10-28 11:04:14,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:04:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 7051 transitions. [2020-10-28 11:04:14,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 995 [2020-10-28 11:04:14,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:04:14,613 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:04:14,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 11:04:14,613 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:04:14,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:04:14,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1410025921, now seen corresponding path program 1 times [2020-10-28 11:04:14,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:04:14,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411889431] [2020-10-28 11:04:14,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:04:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:14,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:17,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:19,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:19,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1014 [2020-10-28 11:04:19,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:04:19,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-28 11:04:19,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:19,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:19,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:04:19,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:04:19,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 11:04:19,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:04:20,489 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:04:20,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:04:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:20,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:20,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:20,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:04:20,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:04:20,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 11:04:20,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:20,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:20,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:04:20,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:04:20,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:04:20,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:04:20,743 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 11:04:20,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:04:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:20,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:20,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:20,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 11:04:20,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:04:20,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 11:04:20,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:20,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:20,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:04:20,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:04:20,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 11:04:20,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:04:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:04:21,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411889431] [2020-10-28 11:04:21,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:04:21,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 11:04:21,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397154191] [2020-10-28 11:04:21,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:04:21,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:04:21,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:04:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:04:21,369 INFO L87 Difference]: Start difference. First operand 4581 states and 7051 transitions. Second operand 7 states. [2020-10-28 11:04:21,878 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:04:22,887 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:04:52,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:04:52,634 INFO L93 Difference]: Finished difference Result 13677 states and 21589 transitions. [2020-10-28 11:04:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 11:04:52,639 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 994 [2020-10-28 11:04:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:04:52,697 INFO L225 Difference]: With dead ends: 13677 [2020-10-28 11:04:52,698 INFO L226 Difference]: Without dead ends: 9102 [2020-10-28 11:04:52,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:04:52,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9102 states. [2020-10-28 11:04:53,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9102 to 8926. [2020-10-28 11:04:53,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8926 states. [2020-10-28 11:04:53,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8926 states to 8926 states and 13897 transitions. [2020-10-28 11:04:53,077 INFO L78 Accepts]: Start accepts. Automaton has 8926 states and 13897 transitions. Word has length 994 [2020-10-28 11:04:53,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:04:53,078 INFO L481 AbstractCegarLoop]: Abstraction has 8926 states and 13897 transitions. [2020-10-28 11:04:53,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:04:53,080 INFO L276 IsEmpty]: Start isEmpty. Operand 8926 states and 13897 transitions. [2020-10-28 11:04:53,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 999 [2020-10-28 11:04:53,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:04:53,121 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:04:53,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 11:04:53,121 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:04:53,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:04:53,122 INFO L82 PathProgramCache]: Analyzing trace with hash -315964598, now seen corresponding path program 1 times [2020-10-28 11:04:53,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:04:53,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715454127] [2020-10-28 11:04:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:04:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:53,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:53,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:58,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:58,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1020 [2020-10-28 11:04:58,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:04:58,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5164 [2020-10-28 11:04:58,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:58,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:58,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:04:58,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 11:04:58,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 11:04:58,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:04:59,028 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:04:59,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:04:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:59,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:59,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:59,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:04:59,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:04:59,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 11:04:59,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:59,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:59,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:04:59,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:04:59,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:04:59,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:04:59,250 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 11:04:59,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:04:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:59,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:59,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:59,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 11:04:59,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:04:59,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 11:04:59,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:59,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:59,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:04:59,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:04:59,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 11:04:59,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:04:59,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-28 11:04:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:59,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:59,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:59,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:04:59,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:04:59,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-28 11:04:59,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:59,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:59,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:04:59,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:04:59,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 11:04:59,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:04:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 11:04:59,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715454127] [2020-10-28 11:04:59,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:04:59,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:04:59,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567011075] [2020-10-28 11:04:59,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:04:59,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:04:59,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:04:59,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:04:59,960 INFO L87 Difference]: Start difference. First operand 8926 states and 13897 transitions. Second operand 7 states. [2020-10-28 11:05:00,603 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:05:01,718 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:05:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:05:47,506 INFO L93 Difference]: Finished difference Result 35491 states and 60477 transitions. [2020-10-28 11:05:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:05:47,507 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 998 [2020-10-28 11:05:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:05:47,657 INFO L225 Difference]: With dead ends: 35491 [2020-10-28 11:05:47,657 INFO L226 Difference]: Without dead ends: 26571 [2020-10-28 11:05:47,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:05:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26571 states. [2020-10-28 11:05:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26571 to 26435. [2020-10-28 11:05:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26435 states. [2020-10-28 11:05:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26435 states to 26435 states and 39950 transitions. [2020-10-28 11:05:48,604 INFO L78 Accepts]: Start accepts. Automaton has 26435 states and 39950 transitions. Word has length 998 [2020-10-28 11:05:48,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:05:48,604 INFO L481 AbstractCegarLoop]: Abstraction has 26435 states and 39950 transitions. [2020-10-28 11:05:48,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:05:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand 26435 states and 39950 transitions. [2020-10-28 11:05:48,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1012 [2020-10-28 11:05:48,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:05:48,740 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 11:05:48,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 11:05:48,741 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:05:48,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:05:48,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1580947514, now seen corresponding path program 1 times [2020-10-28 11:05:48,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:05:48,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470859682] [2020-10-28 11:05:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:05:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:48,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:48,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:49,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:54,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:54,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1035 [2020-10-28 11:05:54,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 11:05:54,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5226 [2020-10-28 11:05:54,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:54,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:54,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:05:54,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 11:05:54,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 11:05:54,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:54,783 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:05:54,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:05:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:54,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:54,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:54,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:05:54,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:54,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 11:05:54,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:54,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:54,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:05:54,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:05:54,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:05:54,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:54,999 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 11:05:55,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:05:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:55,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:55,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:55,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 11:05:55,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:55,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 11:05:55,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:55,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:55,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:05:55,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:05:55,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 11:05:55,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:55,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-28 11:05:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:55,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:55,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:55,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 11:05:55,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:55,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-28 11:05:55,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:55,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:55,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:05:55,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:05:55,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 11:05:55,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:55,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 11:05:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:55,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:55,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:55,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:05:55,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:55,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 11:05:55,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:55,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:55,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:05:55,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-28 11:05:55,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:05:55,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 33 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 11:05:55,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470859682] [2020-10-28 11:05:55,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:05:55,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 11:05:55,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547100159] [2020-10-28 11:05:55,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 11:05:55,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:05:55,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 11:05:55,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 11:05:55,761 INFO L87 Difference]: Start difference. First operand 26435 states and 39950 transitions. Second operand 8 states. [2020-10-28 11:05:56,419 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:05:57,013 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:05:58,204 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 160