/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/Problem12_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 12:18:18,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 12:18:18,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 12:18:18,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 12:18:18,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 12:18:18,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 12:18:18,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 12:18:18,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 12:18:18,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 12:18:18,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 12:18:18,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 12:18:18,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 12:18:18,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 12:18:18,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 12:18:18,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 12:18:18,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 12:18:18,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 12:18:18,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 12:18:18,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 12:18:18,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 12:18:18,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 12:18:18,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 12:18:18,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 12:18:18,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 12:18:18,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 12:18:18,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 12:18:18,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 12:18:18,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 12:18:18,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 12:18:18,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 12:18:18,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 12:18:18,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 12:18:18,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 12:18:18,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 12:18:18,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 12:18:18,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 12:18:18,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 12:18:18,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 12:18:18,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 12:18:18,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 12:18:18,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 12:18:18,706 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 12:18:18,780 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 12:18:18,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 12:18:18,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 12:18:18,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 12:18:18,788 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 12:18:18,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 12:18:18,789 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 12:18:18,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 12:18:18,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 12:18:18,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 12:18:18,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 12:18:18,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 12:18:18,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 12:18:18,793 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 12:18:18,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 12:18:18,793 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 12:18:18,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 12:18:18,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 12:18:18,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 12:18:18,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 12:18:18,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 12:18:18,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 12:18:18,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 12:18:18,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 12:18:18,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 12:18:18,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 12:18:18,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 12:18:18,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 12:18:18,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 12:18:18,798 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 12:18:19,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 12:18:19,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 12:18:19,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 12:18:19,370 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 12:18:19,371 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 12:18:19,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label23.c [2020-10-28 12:18:19,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e2483b2f/b2b12e31b32b4178a69036e4122d1ca4/FLAGfbac35486 [2020-10-28 12:18:20,652 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 12:18:20,653 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label23.c [2020-10-28 12:18:20,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e2483b2f/b2b12e31b32b4178a69036e4122d1ca4/FLAGfbac35486 [2020-10-28 12:18:21,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e2483b2f/b2b12e31b32b4178a69036e4122d1ca4 [2020-10-28 12:18:21,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 12:18:21,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 12:18:21,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 12:18:21,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 12:18:21,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 12:18:21,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:18:21" (1/1) ... [2020-10-28 12:18:21,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c76db6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:21, skipping insertion in model container [2020-10-28 12:18:21,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:18:21" (1/1) ... [2020-10-28 12:18:21,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 12:18:21,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 12:18:22,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:18:22,777 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 12:18:23,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:18:23,723 INFO L208 MainTranslator]: Completed translation [2020-10-28 12:18:23,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:23 WrapperNode [2020-10-28 12:18:23,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 12:18:23,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 12:18:23,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 12:18:23,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 12:18:23,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:23" (1/1) ... [2020-10-28 12:18:23,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:23" (1/1) ... [2020-10-28 12:18:23,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:23" (1/1) ... [2020-10-28 12:18:23,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:23" (1/1) ... [2020-10-28 12:18:24,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:23" (1/1) ... [2020-10-28 12:18:24,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:23" (1/1) ... [2020-10-28 12:18:24,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:23" (1/1) ... [2020-10-28 12:18:24,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 12:18:24,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 12:18:24,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 12:18:24,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 12:18:24,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:23" (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 12:18:24,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 12:18:24,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 12:18:24,216 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 12:18:24,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 12:18:24,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 12:18:24,217 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 12:18:24,217 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 12:18:24,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 12:18:24,217 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 12:18:24,217 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 12:18:24,218 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 12:18:24,218 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 12:18:24,219 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 12:18:24,219 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 12:18:24,219 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 12:18:24,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 12:18:24,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 12:18:24,220 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 12:18:24,220 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 12:18:24,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 12:18:24,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 12:18:24,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 12:18:24,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 12:18:24,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 12:18:24,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 12:18:30,219 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 12:18:30,219 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 12:18:30,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:18:30 BoogieIcfgContainer [2020-10-28 12:18:30,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 12:18:30,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 12:18:30,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 12:18:30,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 12:18:30,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:18:21" (1/3) ... [2020-10-28 12:18:30,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff86414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:18:30, skipping insertion in model container [2020-10-28 12:18:30,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:23" (2/3) ... [2020-10-28 12:18:30,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff86414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:18:30, skipping insertion in model container [2020-10-28 12:18:30,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:18:30" (3/3) ... [2020-10-28 12:18:30,231 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label23.c [2020-10-28 12:18:30,243 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 12:18:30,251 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 12:18:30,264 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 12:18:30,347 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 12:18:30,347 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 12:18:30,348 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 12:18:30,348 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 12:18:30,348 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 12:18:30,348 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 12:18:30,348 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 12:18:30,348 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 12:18:30,396 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-28 12:18:30,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 12:18:30,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:18:30,405 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] [2020-10-28 12:18:30,406 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:18:30,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:18:30,414 INFO L82 PathProgramCache]: Analyzing trace with hash -61379068, now seen corresponding path program 1 times [2020-10-28 12:18:30,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:18:30,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334815915] [2020-10-28 12:18:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:18:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:30,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:31,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:31,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 12:18:31,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:18:31,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 523 [2020-10-28 12:18:31,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:31,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:31,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:18:31,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:18:31,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 12:18:31,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:18:31,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:18:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:31,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:31,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:31,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:18:31,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:18:31,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 12:18:31,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:31,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:31,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:18:31,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:18:31,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:18:31,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:18:31,450 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 12:18:31,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334815915] [2020-10-28 12:18:31,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:18:31,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 12:18:31,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344061905] [2020-10-28 12:18:31,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 12:18:31,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:18:31,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 12:18:31,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 12:18:31,479 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 4 states. [2020-10-28 12:18:42,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:18:42,942 INFO L93 Difference]: Finished difference Result 2476 states and 4742 transitions. [2020-10-28 12:18:42,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:18:42,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-28 12:18:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:18:42,985 INFO L225 Difference]: With dead ends: 2476 [2020-10-28 12:18:42,985 INFO L226 Difference]: Without dead ends: 1569 [2020-10-28 12:18:43,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:18:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-28 12:18:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1554. [2020-10-28 12:18:43,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-10-28 12:18:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2726 transitions. [2020-10-28 12:18:43,229 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2726 transitions. Word has length 42 [2020-10-28 12:18:43,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:18:43,230 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2726 transitions. [2020-10-28 12:18:43,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 12:18:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2726 transitions. [2020-10-28 12:18:43,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 12:18:43,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:18:43,239 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:18:43,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 12:18:43,240 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:18:43,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:18:43,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2053883182, now seen corresponding path program 1 times [2020-10-28 12:18:43,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:18:43,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711773114] [2020-10-28 12:18:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:18:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:43,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:43,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:44,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:44,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:44,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 12:18:44,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:18:44,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1397 [2020-10-28 12:18:44,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:44,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:44,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:18:44,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:18:44,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 12:18:44,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:18:44,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:18:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:44,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:44,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:44,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:18:44,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:18:44,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 12:18:44,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:44,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:44,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:18:44,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:18:44,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:18:44,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:18:44,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:18:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:44,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:45,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:45,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 12:18:45,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:18:45,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-28 12:18:45,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:45,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:45,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:18:45,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:18:45,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:18:45,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:18:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:18:45,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711773114] [2020-10-28 12:18:45,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:18:45,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 12:18:45,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219856720] [2020-10-28 12:18:45,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 12:18:45,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:18:45,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 12:18:45,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:18:45,232 INFO L87 Difference]: Start difference. First operand 1554 states and 2726 transitions. Second operand 8 states. [2020-10-28 12:19:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:19:05,454 INFO L93 Difference]: Finished difference Result 6337 states and 11281 transitions. [2020-10-28 12:19:05,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 12:19:05,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-10-28 12:19:05,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:19:05,489 INFO L225 Difference]: With dead ends: 6337 [2020-10-28 12:19:05,490 INFO L226 Difference]: Without dead ends: 4789 [2020-10-28 12:19:05,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 12:19:05,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4789 states. [2020-10-28 12:19:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4789 to 4750. [2020-10-28 12:19:05,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4750 states. [2020-10-28 12:19:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4750 states to 4750 states and 7432 transitions. [2020-10-28 12:19:05,682 INFO L78 Accepts]: Start accepts. Automaton has 4750 states and 7432 transitions. Word has length 111 [2020-10-28 12:19:05,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:19:05,683 INFO L481 AbstractCegarLoop]: Abstraction has 4750 states and 7432 transitions. [2020-10-28 12:19:05,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 12:19:05,684 INFO L276 IsEmpty]: Start isEmpty. Operand 4750 states and 7432 transitions. [2020-10-28 12:19:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 12:19:05,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:19:05,686 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:19:05,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 12:19:05,687 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:19:05,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:19:05,688 INFO L82 PathProgramCache]: Analyzing trace with hash 834340706, now seen corresponding path program 1 times [2020-10-28 12:19:05,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:19:05,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437365405] [2020-10-28 12:19:05,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:19:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:05,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:05,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:19:05,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 12:19:05,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:19:05,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-28 12:19:05,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:19:05,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:19:05,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:19:05,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 12:19:05,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 12:19:05,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:19:06,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:19:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:06,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:06,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:19:06,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:19:06,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:19:06,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 12:19:06,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:19:06,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:19:06,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:19:06,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:19:06,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:19:06,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:19:06,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:19:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:06,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:06,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:19:06,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:19:06,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:19:06,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-28 12:19:06,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:19:06,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:19:06,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:19:06,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:19:06,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:19:06,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:19:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:19:06,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437365405] [2020-10-28 12:19:06,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:19:06,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:19:06,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417589634] [2020-10-28 12:19:06,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:19:06,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:19:06,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:19:06,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:19:06,354 INFO L87 Difference]: Start difference. First operand 4750 states and 7432 transitions. Second operand 5 states. [2020-10-28 12:19:18,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:19:18,512 INFO L93 Difference]: Finished difference Result 9525 states and 14942 transitions. [2020-10-28 12:19:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:19:18,518 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-10-28 12:19:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:19:18,543 INFO L225 Difference]: With dead ends: 9525 [2020-10-28 12:19:18,543 INFO L226 Difference]: Without dead ends: 4781 [2020-10-28 12:19:18,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:19:18,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4781 states. [2020-10-28 12:19:18,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4781 to 4750. [2020-10-28 12:19:18,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4750 states. [2020-10-28 12:19:18,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4750 states to 4750 states and 6972 transitions. [2020-10-28 12:19:18,718 INFO L78 Accepts]: Start accepts. Automaton has 4750 states and 6972 transitions. Word has length 117 [2020-10-28 12:19:18,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:19:18,718 INFO L481 AbstractCegarLoop]: Abstraction has 4750 states and 6972 transitions. [2020-10-28 12:19:18,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:19:18,719 INFO L276 IsEmpty]: Start isEmpty. Operand 4750 states and 6972 transitions. [2020-10-28 12:19:18,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-28 12:19:18,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:19:18,722 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:19:18,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 12:19:18,722 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:19:18,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:19:18,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1618047768, now seen corresponding path program 1 times [2020-10-28 12:19:18,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:19:18,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147538373] [2020-10-28 12:19:18,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:19:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:18,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:19,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:19,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:20,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:19:20,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 12:19:20,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:19:20,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1527 [2020-10-28 12:19:20,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:19:20,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:19:20,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:19:20,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:19:20,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-28 12:19:20,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:19:20,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:19:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:20,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:20,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:19:20,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:19:20,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:19:20,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 12:19:20,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:19:20,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:19:20,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:19:20,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:19:20,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:19:20,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:19:20,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:19:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:20,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:20,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:19:20,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:19:20,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:19:20,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-28 12:19:20,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:19:20,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:19:20,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:19:20,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:19:20,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:19:20,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 12:19:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:19:20,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147538373] [2020-10-28 12:19:20,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:19:20,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 12:19:20,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449977458] [2020-10-28 12:19:20,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 12:19:20,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:19:20,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 12:19:20,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:19:20,822 INFO L87 Difference]: Start difference. First operand 4750 states and 6972 transitions. Second operand 8 states. [2020-10-28 12:19:38,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:19:38,197 INFO L93 Difference]: Finished difference Result 14566 states and 22425 transitions. [2020-10-28 12:19:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 12:19:38,200 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 136 [2020-10-28 12:19:38,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:19:38,257 INFO L225 Difference]: With dead ends: 14566 [2020-10-28 12:19:38,258 INFO L226 Difference]: Without dead ends: 9822 [2020-10-28 12:19:38,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 12:19:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9822 states. [2020-10-28 12:19:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9822 to 9686. [2020-10-28 12:19:38,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9686 states. [2020-10-28 12:19:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9686 states to 9686 states and 14403 transitions. [2020-10-28 12:19:38,707 INFO L78 Accepts]: Start accepts. Automaton has 9686 states and 14403 transitions. Word has length 136 [2020-10-28 12:19:38,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:19:38,707 INFO L481 AbstractCegarLoop]: Abstraction has 9686 states and 14403 transitions. [2020-10-28 12:19:38,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 12:19:38,708 INFO L276 IsEmpty]: Start isEmpty. Operand 9686 states and 14403 transitions. [2020-10-28 12:19:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-28 12:19:38,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:19:38,712 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:19:38,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 12:19:38,713 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:19:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:19:38,713 INFO L82 PathProgramCache]: Analyzing trace with hash 716925096, now seen corresponding path program 1 times [2020-10-28 12:19:38,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:19:38,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245041445] [2020-10-28 12:19:38,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:19:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:38,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:39,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:39,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:19:39,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-28 12:19:39,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:19:39,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1057 [2020-10-28 12:19:39,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:19:39,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:19:39,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:19:39,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:19:39,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-28 12:19:39,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:19:39,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:19:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:39,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:39,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:19:39,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:19:39,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:19:39,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 12:19:39,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:19:39,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:19:39,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:19:39,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:19:39,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:19:39,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:19:40,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:19:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:40,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:40,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:19:40,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 12:19:40,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:19:40,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-28 12:19:40,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:19:40,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:19:40,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:19:40,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:19:40,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-28 12:19:40,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:19:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:19:40,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245041445] [2020-10-28 12:19:40,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:19:40,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:19:40,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155950056] [2020-10-28 12:19:40,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:19:40,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:19:40,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:19:40,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:19:40,502 INFO L87 Difference]: Start difference. First operand 9686 states and 14403 transitions. Second operand 7 states. [2020-10-28 12:19:57,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:19:57,775 INFO L93 Difference]: Finished difference Result 24556 states and 37890 transitions. [2020-10-28 12:19:57,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:19:57,777 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 168 [2020-10-28 12:19:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:19:57,855 INFO L225 Difference]: With dead ends: 24556 [2020-10-28 12:19:57,855 INFO L226 Difference]: Without dead ends: 14876 [2020-10-28 12:19:57,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:19:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14876 states. [2020-10-28 12:19:58,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14876 to 14712. [2020-10-28 12:19:58,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14712 states. [2020-10-28 12:19:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14712 states to 14712 states and 21046 transitions. [2020-10-28 12:19:58,403 INFO L78 Accepts]: Start accepts. Automaton has 14712 states and 21046 transitions. Word has length 168 [2020-10-28 12:19:58,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:19:58,404 INFO L481 AbstractCegarLoop]: Abstraction has 14712 states and 21046 transitions. [2020-10-28 12:19:58,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:19:58,404 INFO L276 IsEmpty]: Start isEmpty. Operand 14712 states and 21046 transitions. [2020-10-28 12:19:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-28 12:19:58,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:19:58,411 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 12:19:58,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 12:19:58,412 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:19:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:19:58,413 INFO L82 PathProgramCache]: Analyzing trace with hash -49190920, now seen corresponding path program 1 times [2020-10-28 12:19:58,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:19:58,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689050020] [2020-10-28 12:19:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:19:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:58,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:58,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:58,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:59,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:01,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:01,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-28 12:20:01,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:20:01,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2571 [2020-10-28 12:20:01,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:01,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:01,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:20:01,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 12:20:01,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 12:20:01,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:20:01,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:20:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:01,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:01,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:01,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:20:01,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:20:01,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:20:01,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:01,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:01,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:20:01,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:20:01,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:20:01,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:20:01,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:20:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:01,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:01,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:01,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:20:01,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:20:01,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-28 12:20:01,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:01,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:01,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:20:01,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:20:01,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:20:01,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:20:01,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 12:20:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:01,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:01,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:01,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 12:20:01,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:20:01,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-28 12:20:01,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:01,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:01,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:20:01,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:20:01,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 12:20:01,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:20:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:20:01,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689050020] [2020-10-28 12:20:01,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:20:01,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:20:01,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409077572] [2020-10-28 12:20:01,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:20:01,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:20:01,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:20:01,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:20:01,787 INFO L87 Difference]: Start difference. First operand 14712 states and 21046 transitions. Second operand 7 states. [2020-10-28 12:20:06,668 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:20:20,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:20:20,294 INFO L93 Difference]: Finished difference Result 43781 states and 66092 transitions. [2020-10-28 12:20:20,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 12:20:20,297 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 198 [2020-10-28 12:20:20,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:20:20,427 INFO L225 Difference]: With dead ends: 43781 [2020-10-28 12:20:20,428 INFO L226 Difference]: Without dead ends: 29075 [2020-10-28 12:20:20,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:20:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29075 states. [2020-10-28 12:20:21,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29075 to 24308. [2020-10-28 12:20:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24308 states. [2020-10-28 12:20:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24308 states to 24308 states and 34289 transitions. [2020-10-28 12:20:21,319 INFO L78 Accepts]: Start accepts. Automaton has 24308 states and 34289 transitions. Word has length 198 [2020-10-28 12:20:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:20:21,320 INFO L481 AbstractCegarLoop]: Abstraction has 24308 states and 34289 transitions. [2020-10-28 12:20:21,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:20:21,320 INFO L276 IsEmpty]: Start isEmpty. Operand 24308 states and 34289 transitions. [2020-10-28 12:20:21,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-28 12:20:21,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:20:21,328 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:20:21,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 12:20:21,328 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:20:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:20:21,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1716739978, now seen corresponding path program 1 times [2020-10-28 12:20:21,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:20:21,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123125990] [2020-10-28 12:20:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:20:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:21,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:21,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:22,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:26,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:26,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-28 12:20:26,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:20:26,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4663 [2020-10-28 12:20:26,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:26,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:26,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:20:26,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-28 12:20:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 12:20:26,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:20:26,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:20:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:26,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:26,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:26,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:20:26,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:20:26,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 12:20:26,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:26,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:26,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:20:26,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:20:26,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:20:26,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:20:26,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:20:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:26,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:26,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:26,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 12:20:26,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:20:26,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-28 12:20:26,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:26,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:26,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:20:26,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:20:26,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 12:20:26,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:20:26,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-28 12:20:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:26,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:26,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:26,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 12:20:26,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:20:26,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-28 12:20:26,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:26,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:26,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:20:26,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:20:26,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-28 12:20:26,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:20:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:20:26,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123125990] [2020-10-28 12:20:26,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:20:26,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:20:26,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497393434] [2020-10-28 12:20:26,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:20:26,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:20:26,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:20:26,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:20:26,966 INFO L87 Difference]: Start difference. First operand 24308 states and 34289 transitions. Second operand 7 states. [2020-10-28 12:20:44,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:20:44,831 INFO L93 Difference]: Finished difference Result 55107 states and 80202 transitions. [2020-10-28 12:20:44,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:20:44,836 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 251 [2020-10-28 12:20:44,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:20:44,973 INFO L225 Difference]: With dead ends: 55107 [2020-10-28 12:20:44,973 INFO L226 Difference]: Without dead ends: 30805 [2020-10-28 12:20:45,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:20:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30805 states. [2020-10-28 12:20:45,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30805 to 29882. [2020-10-28 12:20:45,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29882 states. [2020-10-28 12:20:45,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29882 states to 29882 states and 38800 transitions. [2020-10-28 12:20:45,855 INFO L78 Accepts]: Start accepts. Automaton has 29882 states and 38800 transitions. Word has length 251 [2020-10-28 12:20:45,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:20:45,856 INFO L481 AbstractCegarLoop]: Abstraction has 29882 states and 38800 transitions. [2020-10-28 12:20:45,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:20:45,857 INFO L276 IsEmpty]: Start isEmpty. Operand 29882 states and 38800 transitions. [2020-10-28 12:20:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-10-28 12:20:45,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:20:45,874 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:20:45,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 12:20:45,874 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:20:45,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:20:45,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2032835976, now seen corresponding path program 1 times [2020-10-28 12:20:45,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:20:45,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328596368] [2020-10-28 12:20:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:20:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:45,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:46,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:48,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:50,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:50,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:50,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 346 [2020-10-28 12:20:50,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:20:50,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 12:20:50,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:50,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:50,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:20:50,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 206 [2020-10-28 12:20:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-28 12:20:50,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 12:20:51,229 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:20:51,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:20:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:51,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:51,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:51,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:20:51,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:20:51,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 12:20:51,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:51,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:51,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:20:51,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:20:51,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:20:51,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:20:51,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:20:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:51,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:51,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:51,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 12:20:51,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:20:51,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-28 12:20:51,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:51,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:51,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:20:51,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:20:51,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:20:51,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:20:51,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-10-28 12:20:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:51,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:51,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:51,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 12:20:51,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:20:51,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-28 12:20:51,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:51,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:51,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:20:51,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:20:51,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 12:20:51,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:20:51,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-10-28 12:20:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:51,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:51,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:51,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:20:51,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:20:51,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-28 12:20:51,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:51,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:51,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:20:51,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:20:51,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:20:51,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:20:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 231 proven. 35 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-28 12:20:52,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328596368] [2020-10-28 12:20:52,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:20:52,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 12:20:52,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714072830] [2020-10-28 12:20:52,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 12:20:52,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:20:52,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 12:20:52,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:20:52,058 INFO L87 Difference]: Start difference. First operand 29882 states and 38800 transitions. Second operand 6 states. [2020-10-28 12:21:11,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:21:11,976 INFO L93 Difference]: Finished difference Result 75685 states and 100472 transitions. [2020-10-28 12:21:11,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 12:21:11,978 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 330 [2020-10-28 12:21:11,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:21:12,164 INFO L225 Difference]: With dead ends: 75685 [2020-10-28 12:21:12,164 INFO L226 Difference]: Without dead ends: 45809 [2020-10-28 12:21:12,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:21:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45809 states. [2020-10-28 12:21:13,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45809 to 45707. [2020-10-28 12:21:13,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45707 states. [2020-10-28 12:21:13,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45707 states to 45707 states and 58636 transitions. [2020-10-28 12:21:13,728 INFO L78 Accepts]: Start accepts. Automaton has 45707 states and 58636 transitions. Word has length 330 [2020-10-28 12:21:13,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:21:13,730 INFO L481 AbstractCegarLoop]: Abstraction has 45707 states and 58636 transitions. [2020-10-28 12:21:13,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 12:21:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 45707 states and 58636 transitions. [2020-10-28 12:21:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-28 12:21:13,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:21:13,748 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:21:13,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 12:21:13,749 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:21:13,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:21:13,749 INFO L82 PathProgramCache]: Analyzing trace with hash -337101880, now seen corresponding path program 1 times [2020-10-28 12:21:13,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:21:13,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994493374] [2020-10-28 12:21:13,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:21:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:21:14,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:14,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:14,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:14,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:17,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:18,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:18,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:19,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:21:19,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 350 [2020-10-28 12:21:19,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 12:21:19,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 12:21:19,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:21:19,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:21:19,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:21:19,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 12:21:19,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 222 [2020-10-28 12:21:19,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:21:19,367 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:21:19,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:21:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:21:19,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:19,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:21:19,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:21:19,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:21:19,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 12:21:19,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:21:19,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:21:19,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:21:19,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:21:19,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:21:19,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:21:19,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:21:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:21:19,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:19,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:21:19,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:21:19,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:21:19,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-28 12:21:19,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:21:19,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:21:19,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:21:19,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:21:19,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:21:19,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:21:19,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 12:21:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:21:19,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:19,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:19,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:21:19,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 12:21:19,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:21:19,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-28 12:21:19,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:21:19,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:21:19,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:21:19,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:21:19,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 12:21:19,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:21:20,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-10-28 12:21:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:21:20,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:20,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:21:20,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 12:21:20,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:21:20,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-28 12:21:20,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:21:20,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:21:20,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:21:20,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:21:20,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-28 12:21:20,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:21:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 330 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 12:21:20,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994493374] [2020-10-28 12:21:20,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:21:20,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 12:21:20,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479476368] [2020-10-28 12:21:20,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 12:21:20,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:21:20,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 12:21:20,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:21:20,530 INFO L87 Difference]: Start difference. First operand 45707 states and 58636 transitions. Second operand 8 states. [2020-10-28 12:21:20,681 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 12:21:35,316 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 12:21:52,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:21:52,159 INFO L93 Difference]: Finished difference Result 124835 states and 166093 transitions. [2020-10-28 12:21:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:21:52,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 334 [2020-10-28 12:21:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:21:52,555 INFO L225 Difference]: With dead ends: 124835 [2020-10-28 12:21:52,556 INFO L226 Difference]: Without dead ends: 79134 [2020-10-28 12:21:52,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-28 12:21:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79134 states. [2020-10-28 12:21:55,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79134 to 75787. [2020-10-28 12:21:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75787 states. [2020-10-28 12:21:55,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75787 states to 75787 states and 95752 transitions. [2020-10-28 12:21:55,828 INFO L78 Accepts]: Start accepts. Automaton has 75787 states and 95752 transitions. Word has length 334 [2020-10-28 12:21:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:21:55,828 INFO L481 AbstractCegarLoop]: Abstraction has 75787 states and 95752 transitions. [2020-10-28 12:21:55,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 12:21:55,829 INFO L276 IsEmpty]: Start isEmpty. Operand 75787 states and 95752 transitions. [2020-10-28 12:21:55,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-10-28 12:21:55,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:21:55,865 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:21:55,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 12:21:55,865 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:21:55,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:21:55,866 INFO L82 PathProgramCache]: Analyzing trace with hash -254601362, now seen corresponding path program 1 times [2020-10-28 12:21:55,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:21:55,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406312689] [2020-10-28 12:21:55,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:21:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:21:56,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:56,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:56,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking...