/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:07:32,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:07:32,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:07:32,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:07:32,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:07:32,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:07:32,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:07:32,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:07:32,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:07:32,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:07:32,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:07:32,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:07:32,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:07:32,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:07:32,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:07:32,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:07:32,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:07:32,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:07:32,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:07:32,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:07:32,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:07:32,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:07:32,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:07:32,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:07:32,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:07:32,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:07:32,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:07:32,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:07:32,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:07:32,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:07:32,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:07:32,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:07:32,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:07:32,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:07:32,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:07:32,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:07:32,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:07:32,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:07:32,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:07:32,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:07:32,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:07:32,689 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 23:07:32,720 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:07:32,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:07:32,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:07:32,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:07:32,723 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:07:32,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:07:32,724 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:07:32,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:07:32,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:07:32,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:07:32,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:07:32,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:07:32,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:07:32,725 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:07:32,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:07:32,726 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:07:32,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:07:32,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:07:32,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:07:32,727 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:07:32,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:07:32,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:07:32,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:07:32,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:07:32,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:07:32,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:07:32,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:07:32,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:07:32,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:07:32,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:07:33,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:07:33,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:07:33,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:07:33,243 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:07:33,244 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:07:33,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label18.c [2020-10-26 23:07:33,351 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c2683e9e/812dc3ebde2346e1bda1df5e75b3c8d7/FLAGd6b6c71ca [2020-10-26 23:07:34,483 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:07:34,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label18.c [2020-10-26 23:07:34,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c2683e9e/812dc3ebde2346e1bda1df5e75b3c8d7/FLAGd6b6c71ca [2020-10-26 23:07:34,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c2683e9e/812dc3ebde2346e1bda1df5e75b3c8d7 [2020-10-26 23:07:34,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:07:34,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:07:34,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:07:34,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:07:34,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:07:34,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:07:34" (1/1) ... [2020-10-26 23:07:34,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733088d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:34, skipping insertion in model container [2020-10-26 23:07:34,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:07:34" (1/1) ... [2020-10-26 23:07:34,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:07:35,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:07:36,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:07:36,732 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:07:37,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:07:37,537 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:07:37,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:37 WrapperNode [2020-10-26 23:07:37,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:07:37,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:07:37,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:07:37,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:07:37,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:37" (1/1) ... [2020-10-26 23:07:37,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:37" (1/1) ... [2020-10-26 23:07:37,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:37" (1/1) ... [2020-10-26 23:07:37,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:37" (1/1) ... [2020-10-26 23:07:37,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:37" (1/1) ... [2020-10-26 23:07:37,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:37" (1/1) ... [2020-10-26 23:07:37,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:37" (1/1) ... [2020-10-26 23:07:38,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:07:38,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:07:38,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:07:38,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:07:38,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:07:38,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:07:38,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:07:38,192 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:07:38,192 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:07:38,192 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:07:38,193 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:07:38,193 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:07:38,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:07:38,193 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:07:38,193 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:07:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:07:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:07:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:07:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:07:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:07:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:07:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:07:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:07:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:07:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:07:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:07:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:07:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:07:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:07:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:07:48,436 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:07:48,437 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:07:48,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:07:48 BoogieIcfgContainer [2020-10-26 23:07:48,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:07:48,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:07:48,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:07:48,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:07:48,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:07:34" (1/3) ... [2020-10-26 23:07:48,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@317f6cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:07:48, skipping insertion in model container [2020-10-26 23:07:48,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:37" (2/3) ... [2020-10-26 23:07:48,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@317f6cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:07:48, skipping insertion in model container [2020-10-26 23:07:48,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:07:48" (3/3) ... [2020-10-26 23:07:48,459 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label18.c [2020-10-26 23:07:48,475 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:07:48,483 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:07:48,501 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:07:48,560 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:07:48,560 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:07:48,560 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:07:48,560 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:07:48,560 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:07:48,561 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:07:48,561 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:07:48,561 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:07:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:07:48,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 23:07:48,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:07:48,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:07:48,646 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:07:48,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:07:48,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1716050886, now seen corresponding path program 1 times [2020-10-26 23:07:48,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:07:48,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468514279] [2020-10-26 23:07:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:07:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:49,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:49,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:49,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 23:07:49,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:49,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 815 [2020-10-26 23:07:49,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:49,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:07:49,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:07:49,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 23:07:49,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:07:50,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:07:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:50,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:50,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:50,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:07:50,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:50,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 23:07:50,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:50,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:07:50,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:07:50,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:07:50,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:07:50,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468514279] [2020-10-26 23:07:50,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:07:50,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:07:50,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974270166] [2020-10-26 23:07:50,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:07:50,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:07:50,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:07:50,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:07:50,195 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:08:10,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:08:10,059 INFO L93 Difference]: Finished difference Result 3235 states and 5915 transitions. [2020-10-26 23:08:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:08:10,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-26 23:08:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:08:10,108 INFO L225 Difference]: With dead ends: 3235 [2020-10-26 23:08:10,110 INFO L226 Difference]: Without dead ends: 2027 [2020-10-26 23:08:10,123 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 [2020-10-26 23:08:10,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2020-10-26 23:08:10,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2010. [2020-10-26 23:08:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2020-10-26 23:08:10,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3292 transitions. [2020-10-26 23:08:10,334 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3292 transitions. Word has length 70 [2020-10-26 23:08:10,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:08:10,336 INFO L481 AbstractCegarLoop]: Abstraction has 2010 states and 3292 transitions. [2020-10-26 23:08:10,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:08:10,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3292 transitions. [2020-10-26 23:08:10,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-26 23:08:10,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:08:10,345 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:08:10,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:08:10,345 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:08:10,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:08:10,346 INFO L82 PathProgramCache]: Analyzing trace with hash -429482830, now seen corresponding path program 1 times [2020-10-26 23:08:10,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:08:10,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165206826] [2020-10-26 23:08:10,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:08:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:10,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:10,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:12,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:13,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:13,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-26 23:08:13,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:08:13,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3252 [2020-10-26 23:08:13,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:13,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:08:13,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:08:13,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:08:13,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:08:13,929 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:08:13,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:08:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:13,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:13,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:13,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:08:13,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:13,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 23:08:13,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:13,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:08:13,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:08:13,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:08:13,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:13,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:08:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:14,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:14,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:14,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:08:14,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:14,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-26 23:08:14,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:14,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:08:14,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:08:14,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:08:14,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:08:14,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165206826] [2020-10-26 23:08:14,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:08:14,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:08:14,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447634061] [2020-10-26 23:08:14,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:08:14,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:08:14,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:08:14,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:08:14,348 INFO L87 Difference]: Start difference. First operand 2010 states and 3292 transitions. Second operand 7 states. [2020-10-26 23:08:42,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:08:42,692 INFO L93 Difference]: Finished difference Result 5854 states and 9672 transitions. [2020-10-26 23:08:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:08:42,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 145 [2020-10-26 23:08:42,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:08:42,731 INFO L225 Difference]: With dead ends: 5854 [2020-10-26 23:08:42,732 INFO L226 Difference]: Without dead ends: 3850 [2020-10-26 23:08:42,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:08:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-10-26 23:08:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 3762. [2020-10-26 23:08:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3762 states. [2020-10-26 23:08:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3762 states to 3762 states and 5630 transitions. [2020-10-26 23:08:42,921 INFO L78 Accepts]: Start accepts. Automaton has 3762 states and 5630 transitions. Word has length 145 [2020-10-26 23:08:42,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:08:42,925 INFO L481 AbstractCegarLoop]: Abstraction has 3762 states and 5630 transitions. [2020-10-26 23:08:42,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:08:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3762 states and 5630 transitions. [2020-10-26 23:08:42,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-26 23:08:42,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:08:42,937 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:08:42,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:08:42,938 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:08:42,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:08:42,943 INFO L82 PathProgramCache]: Analyzing trace with hash -611848074, now seen corresponding path program 1 times [2020-10-26 23:08:42,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:08:42,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894166725] [2020-10-26 23:08:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:08:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:43,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:43,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:44,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:44,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-26 23:08:44,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:08:44,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1471 [2020-10-26 23:08:44,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:44,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:08:44,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:08:44,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:08:44,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:44,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:08:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:44,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:44,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:44,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:08:44,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:44,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 23:08:44,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:44,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:08:44,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:08:44,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:08:44,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:44,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:08:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:44,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:44,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:44,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 23:08:44,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:44,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-26 23:08:44,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:44,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:08:44,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:08:44,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:08:44,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:08:44,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894166725] [2020-10-26 23:08:44,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:08:44,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:08:44,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416138176] [2020-10-26 23:08:44,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:08:44,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:08:44,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:08:44,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:08:44,942 INFO L87 Difference]: Start difference. First operand 3762 states and 5630 transitions. Second operand 7 states. [2020-10-26 23:09:11,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:09:11,244 INFO L93 Difference]: Finished difference Result 11050 states and 16923 transitions. [2020-10-26 23:09:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:09:11,246 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 159 [2020-10-26 23:09:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:09:11,293 INFO L225 Difference]: With dead ends: 11050 [2020-10-26 23:09:11,294 INFO L226 Difference]: Without dead ends: 7294 [2020-10-26 23:09:11,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:09:11,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7294 states. [2020-10-26 23:09:11,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7294 to 7226. [2020-10-26 23:09:11,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7226 states. [2020-10-26 23:09:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7226 states to 7226 states and 9872 transitions. [2020-10-26 23:09:11,578 INFO L78 Accepts]: Start accepts. Automaton has 7226 states and 9872 transitions. Word has length 159 [2020-10-26 23:09:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:09:11,581 INFO L481 AbstractCegarLoop]: Abstraction has 7226 states and 9872 transitions. [2020-10-26 23:09:11,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:09:11,581 INFO L276 IsEmpty]: Start isEmpty. Operand 7226 states and 9872 transitions. [2020-10-26 23:09:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-26 23:09:11,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:09:11,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:09:11,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:09:11,597 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:09:11,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:09:11,597 INFO L82 PathProgramCache]: Analyzing trace with hash -399347370, now seen corresponding path program 1 times [2020-10-26 23:09:11,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:09:11,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318797989] [2020-10-26 23:09:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:09:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:11,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:12,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:13,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:13,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-26 23:09:13,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:09:13,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1393 [2020-10-26 23:09:13,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:13,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:09:13,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:09:13,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 23:09:13,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:13,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:09:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:13,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:13,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:13,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:09:13,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:13,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 23:09:13,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:13,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:09:13,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:09:13,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:09:13,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:13,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:09:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:13,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:13,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:13,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 23:09:13,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:13,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-26 23:09:13,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:13,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:09:13,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:09:13,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:09:13,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:09:13,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318797989] [2020-10-26 23:09:13,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:09:13,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:09:13,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106428548] [2020-10-26 23:09:13,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:09:13,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:09:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:09:13,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:09:13,650 INFO L87 Difference]: Start difference. First operand 7226 states and 9872 transitions. Second operand 7 states. [2020-10-26 23:09:43,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:09:43,722 INFO L93 Difference]: Finished difference Result 21985 states and 31294 transitions. [2020-10-26 23:09:43,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:09:43,723 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 175 [2020-10-26 23:09:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:09:43,818 INFO L225 Difference]: With dead ends: 21985 [2020-10-26 23:09:43,818 INFO L226 Difference]: Without dead ends: 14765 [2020-10-26 23:09:43,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:09:43,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14765 states. [2020-10-26 23:09:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14765 to 14498. [2020-10-26 23:09:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14498 states. [2020-10-26 23:09:44,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14498 states to 14498 states and 18568 transitions. [2020-10-26 23:09:44,367 INFO L78 Accepts]: Start accepts. Automaton has 14498 states and 18568 transitions. Word has length 175 [2020-10-26 23:09:44,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:09:44,369 INFO L481 AbstractCegarLoop]: Abstraction has 14498 states and 18568 transitions. [2020-10-26 23:09:44,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:09:44,369 INFO L276 IsEmpty]: Start isEmpty. Operand 14498 states and 18568 transitions. [2020-10-26 23:09:44,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-26 23:09:44,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:09:44,378 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:09:44,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:09:44,378 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:09:44,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:09:44,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1632364670, now seen corresponding path program 1 times [2020-10-26 23:09:44,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:09:44,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464899494] [2020-10-26 23:09:44,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:09:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:44,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:44,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:44,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:49,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:49,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 284 [2020-10-26 23:09:49,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:09:49,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 23:09:49,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:49,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:09:49,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:09:49,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:09:49,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:49,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:09:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:49,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:49,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:49,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:09:49,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:49,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:09:49,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:49,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:09:49,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:09:49,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:09:49,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:49,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:09:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:49,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:50,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:50,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:09:50,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:50,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-26 23:09:50,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:50,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:09:50,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:09:50,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:09:50,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:50,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:09:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:50,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:50,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:50,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:09:50,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:50,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 23:09:50,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:50,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:09:50,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:09:50,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:09:50,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 124 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:09:50,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464899494] [2020-10-26 23:09:50,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:09:50,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:09:50,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271084108] [2020-10-26 23:09:50,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:09:50,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:09:50,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:09:50,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:09:50,458 INFO L87 Difference]: Start difference. First operand 14498 states and 18568 transitions. Second operand 7 states. [2020-10-26 23:09:50,626 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:09:52,675 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-26 23:10:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:10:14,663 INFO L93 Difference]: Finished difference Result 30381 states and 39002 transitions. [2020-10-26 23:10:14,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:10:14,669 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 270 [2020-10-26 23:10:14,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:10:14,740 INFO L225 Difference]: With dead ends: 30381 [2020-10-26 23:10:14,741 INFO L226 Difference]: Without dead ends: 15889 [2020-10-26 23:10:14,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:10:14,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15889 states. [2020-10-26 23:10:15,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15889 to 15522. [2020-10-26 23:10:15,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15522 states. [2020-10-26 23:10:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15522 states to 15522 states and 19754 transitions. [2020-10-26 23:10:15,327 INFO L78 Accepts]: Start accepts. Automaton has 15522 states and 19754 transitions. Word has length 270 [2020-10-26 23:10:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:10:15,327 INFO L481 AbstractCegarLoop]: Abstraction has 15522 states and 19754 transitions. [2020-10-26 23:10:15,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:10:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand 15522 states and 19754 transitions. [2020-10-26 23:10:15,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-26 23:10:15,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:10:15,336 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:10:15,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:10:15,336 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:10:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:10:15,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1944263627, now seen corresponding path program 1 times [2020-10-26 23:10:15,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:10:15,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839619096] [2020-10-26 23:10:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:10:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:15,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:15,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:17,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:17,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-26 23:10:17,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:10:17,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1704 [2020-10-26 23:10:17,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:17,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:10:17,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:10:17,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 23:10:17,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:17,326 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:10:17,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:10:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:17,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:17,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:17,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:10:17,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:17,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 23:10:17,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:17,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:10:17,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:10:17,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:10:17,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:17,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:10:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:17,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:17,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:17,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:10:17,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:17,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-26 23:10:17,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:17,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:10:17,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:10:17,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:10:17,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:17,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:10:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:17,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:17,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:17,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:10:17,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:17,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-26 23:10:17,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:17,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:10:17,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:10:17,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 23:10:17,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:10:18,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839619096] [2020-10-26 23:10:18,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:10:18,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:10:18,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219631981] [2020-10-26 23:10:18,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:10:18,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:10:18,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:10:18,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:10:18,035 INFO L87 Difference]: Start difference. First operand 15522 states and 19754 transitions. Second operand 7 states. [2020-10-26 23:10:22,392 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:10:48,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:10:48,043 INFO L93 Difference]: Finished difference Result 37802 states and 51060 transitions. [2020-10-26 23:10:48,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:10:48,046 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 277 [2020-10-26 23:10:48,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:10:48,131 INFO L225 Difference]: With dead ends: 37802 [2020-10-26 23:10:48,131 INFO L226 Difference]: Without dead ends: 23089 [2020-10-26 23:10:48,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:10:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23089 states. [2020-10-26 23:10:48,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23089 to 22772. [2020-10-26 23:10:48,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22772 states. [2020-10-26 23:10:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22772 states to 22772 states and 28930 transitions. [2020-10-26 23:10:48,930 INFO L78 Accepts]: Start accepts. Automaton has 22772 states and 28930 transitions. Word has length 277 [2020-10-26 23:10:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:10:48,931 INFO L481 AbstractCegarLoop]: Abstraction has 22772 states and 28930 transitions. [2020-10-26 23:10:48,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:10:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 22772 states and 28930 transitions. [2020-10-26 23:10:48,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-10-26 23:10:48,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:10:48,938 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:10:48,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:10:48,939 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:10:48,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:10:48,939 INFO L82 PathProgramCache]: Analyzing trace with hash 829711753, now seen corresponding path program 1 times [2020-10-26 23:10:48,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:10:48,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887120966] [2020-10-26 23:10:48,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:10:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:49,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:49,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:49,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:50,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:51,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:51,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 306 [2020-10-26 23:10:51,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:10:51,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2795 [2020-10-26 23:10:51,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:51,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 23:10:51,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:10:51,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 297 [2020-10-26 23:10:51,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:10:52,094 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:10:52,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:10:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:52,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:52,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:52,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:10:52,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:52,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 23:10:52,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:52,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:10:52,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:10:52,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:10:52,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:52,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:10:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:52,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:52,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:52,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:52,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:10:52,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:10:52,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-26 23:10:52,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:10:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:10:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:10:52,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:52,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:10:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:52,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:52,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:53,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:53,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:10:53,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:10:53,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-26 23:10:53,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:53,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:10:53,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:10:53,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:10:53,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:53,537 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-26 23:10:53,774 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-26 23:10:53,957 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-26 23:10:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 11 proven. 170 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 23:10:54,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887120966] [2020-10-26 23:10:54,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:10:54,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 23:10:54,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219491745] [2020-10-26 23:10:54,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 23:10:54,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:10:54,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 23:10:54,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:10:54,373 INFO L87 Difference]: Start difference. First operand 22772 states and 28930 transitions. Second operand 11 states. [2020-10-26 23:10:54,816 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-10-26 23:10:55,457 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-10-26 23:10:55,812 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-10-26 23:10:56,594 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-10-26 23:10:58,546 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2020-10-26 23:10:59,459 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2020-10-26 23:11:00,711 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-10-26 23:11:01,153 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-26 23:11:01,662 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-10-26 23:11:02,045 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2020-10-26 23:11:04,574 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-26 23:11:06,288 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:11:09,050 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-10-26 23:11:09,597 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2020-10-26 23:11:15,544 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-10-26 23:11:15,916 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2020-10-26 23:11:16,892 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33