/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/Problem17_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 13:43:36,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 13:43:36,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 13:43:36,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 13:43:36,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 13:43:36,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 13:43:36,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 13:43:36,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 13:43:36,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 13:43:36,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 13:43:36,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 13:43:36,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 13:43:36,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 13:43:36,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 13:43:36,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 13:43:36,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 13:43:36,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 13:43:36,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 13:43:36,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 13:43:36,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 13:43:36,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 13:43:36,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 13:43:36,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 13:43:36,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 13:43:36,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 13:43:36,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 13:43:36,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 13:43:36,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 13:43:36,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 13:43:36,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 13:43:36,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 13:43:36,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 13:43:36,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 13:43:36,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 13:43:36,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 13:43:36,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 13:43:36,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 13:43:36,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 13:43:36,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 13:43:36,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 13:43:36,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 13:43:36,875 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 13:43:36,940 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 13:43:36,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 13:43:36,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 13:43:36,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 13:43:36,947 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 13:43:36,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 13:43:36,947 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 13:43:36,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 13:43:36,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 13:43:36,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 13:43:36,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 13:43:36,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 13:43:36,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 13:43:36,951 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 13:43:36,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 13:43:36,951 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 13:43:36,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 13:43:36,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 13:43:36,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 13:43:36,953 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 13:43:36,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 13:43:36,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:43:36,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 13:43:36,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 13:43:36,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 13:43:36,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 13:43:36,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 13:43:36,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 13:43:36,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 13:43:36,955 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 13:43:37,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 13:43:37,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 13:43:37,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 13:43:37,555 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 13:43:37,556 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 13:43:37,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label50.c [2020-10-28 13:43:37,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db4ffc387/4b2bf17a86f44b8c87edcbd0ed02781a/FLAG589d6e875 [2020-10-28 13:43:38,759 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 13:43:38,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label50.c [2020-10-28 13:43:38,800 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db4ffc387/4b2bf17a86f44b8c87edcbd0ed02781a/FLAG589d6e875 [2020-10-28 13:43:39,230 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db4ffc387/4b2bf17a86f44b8c87edcbd0ed02781a [2020-10-28 13:43:39,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 13:43:39,248 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 13:43:39,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 13:43:39,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 13:43:39,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 13:43:39,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:43:39" (1/1) ... [2020-10-28 13:43:39,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29916ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:43:39, skipping insertion in model container [2020-10-28 13:43:39,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:43:39" (1/1) ... [2020-10-28 13:43:39,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 13:43:39,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 13:43:40,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:43:40,798 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 13:43:41,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:43:41,437 INFO L208 MainTranslator]: Completed translation [2020-10-28 13:43:41,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:43:41 WrapperNode [2020-10-28 13:43:41,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 13:43:41,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 13:43:41,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 13:43:41,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 13:43:41,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:43:41" (1/1) ... [2020-10-28 13:43:41,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:43:41" (1/1) ... [2020-10-28 13:43:41,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:43:41" (1/1) ... [2020-10-28 13:43:41,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:43:41" (1/1) ... [2020-10-28 13:43:41,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:43:41" (1/1) ... [2020-10-28 13:43:41,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:43:41" (1/1) ... [2020-10-28 13:43:41,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:43:41" (1/1) ... [2020-10-28 13:43:41,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 13:43:41,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 13:43:41,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 13:43:41,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 13:43:41,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:43:41" (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 13:43:41,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 13:43:41,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 13:43:41,904 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 13:43:41,904 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 13:43:41,905 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 13:43:41,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 13:43:41,905 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 13:43:41,906 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 13:43:41,906 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 13:43:41,906 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 13:43:41,907 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 13:43:41,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 13:43:41,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 13:43:41,908 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 13:43:41,908 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 13:43:41,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 13:43:41,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 13:43:41,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 13:43:41,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 13:43:41,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 13:43:41,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 13:43:51,653 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 13:43:51,653 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 13:43:51,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:43:51 BoogieIcfgContainer [2020-10-28 13:43:51,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 13:43:51,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 13:43:51,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 13:43:51,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 13:43:51,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 01:43:39" (1/3) ... [2020-10-28 13:43:51,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f543b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:43:51, skipping insertion in model container [2020-10-28 13:43:51,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:43:41" (2/3) ... [2020-10-28 13:43:51,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f543b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:43:51, skipping insertion in model container [2020-10-28 13:43:51,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:43:51" (3/3) ... [2020-10-28 13:43:51,673 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label50.c [2020-10-28 13:43:51,693 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 13:43:51,701 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 13:43:51,718 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 13:43:51,763 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 13:43:51,763 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 13:43:51,763 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 13:43:51,763 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 13:43:51,763 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 13:43:51,764 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 13:43:51,764 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 13:43:51,764 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 13:43:51,803 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-28 13:43:51,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 13:43:51,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:43:51,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:43:51,817 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:43:51,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:43:51,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1057896354, now seen corresponding path program 1 times [2020-10-28 13:43:51,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:43:51,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468468168] [2020-10-28 13:43:51,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:43:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:43:52,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:43:52,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:43:52,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 13:43:52,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:43:52,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-10-28 13:43:52,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:43:52,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:43:52,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:43:52,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:43:52,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 13:43:52,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 13:43:52,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:43:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:43:52,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:43:52,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:43:52,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:43:52,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:43:52,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 13:43:52,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:43:52,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:43:52,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:43:52,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:43:52,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:43:52,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:43:52,889 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 13:43:52,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468468168] [2020-10-28 13:43:52,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:43:52,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 13:43:52,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064269317] [2020-10-28 13:43:52,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 13:43:52,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:43:52,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 13:43:52,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 13:43:52,927 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-28 13:44:07,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:44:07,676 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-28 13:44:07,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:44:07,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 13:44:07,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:44:07,706 INFO L225 Difference]: With dead ends: 1697 [2020-10-28 13:44:07,707 INFO L226 Difference]: Without dead ends: 1013 [2020-10-28 13:44:07,721 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 13:44:07,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-28 13:44:07,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-28 13:44:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-28 13:44:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-28 13:44:07,886 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 16 [2020-10-28 13:44:07,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:44:07,887 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-28 13:44:07,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 13:44:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-28 13:44:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 13:44:07,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:44:07,896 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 13:44:07,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 13:44:07,897 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:44:07,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:44:07,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1564549758, now seen corresponding path program 1 times [2020-10-28 13:44:07,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:44:07,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522455101] [2020-10-28 13:44:07,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:44:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:44:08,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:44:08,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:44:09,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:44:09,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 13:44:09,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:44:09,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1425 [2020-10-28 13:44:09,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:44:09,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:44:09,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:44:09,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:44:09,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 13:44:09,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:44:09,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:44:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:44:09,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:44:09,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:44:09,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:44:09,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:44:09,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 13:44:09,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:44:09,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:44:09,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:44:09,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:44:09,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:44:09,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:44:09,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:44:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:44:09,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:44:09,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:44:09,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 13:44:09,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:44:09,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-28 13:44:09,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:44:09,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:44:09,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:44:09,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:44:09,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 13:44:09,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:44:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:44:09,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522455101] [2020-10-28 13:44:09,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:44:09,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:44:09,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640629643] [2020-10-28 13:44:10,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:44:10,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:44:10,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:44:10,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:44:10,011 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 7 states. [2020-10-28 13:44:24,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:44:24,873 INFO L93 Difference]: Finished difference Result 2930 states and 4534 transitions. [2020-10-28 13:44:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:44:24,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 87 [2020-10-28 13:44:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:44:24,890 INFO L225 Difference]: With dead ends: 2930 [2020-10-28 13:44:24,890 INFO L226 Difference]: Without dead ends: 1933 [2020-10-28 13:44:24,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:44:24,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-10-28 13:44:25,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1902. [2020-10-28 13:44:25,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-10-28 13:44:25,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 2466 transitions. [2020-10-28 13:44:25,021 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 2466 transitions. Word has length 87 [2020-10-28 13:44:25,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:44:25,023 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 2466 transitions. [2020-10-28 13:44:25,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:44:25,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 2466 transitions. [2020-10-28 13:44:25,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 13:44:25,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:44:25,030 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 13:44:25,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 13:44:25,030 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:44:25,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:44:25,034 INFO L82 PathProgramCache]: Analyzing trace with hash -262850737, now seen corresponding path program 1 times [2020-10-28 13:44:25,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:44:25,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399478609] [2020-10-28 13:44:25,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:44:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:44:25,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:44:25,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:44:25,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 13:44:25,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:44:25,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 723 [2020-10-28 13:44:25,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:44:25,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:44:25,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 13:44:25,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:44:25,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-28 13:44:25,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:44:25,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:44:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:44:25,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:44:25,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:44:25,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:44:25,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:44:25,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 13:44:25,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:44:26,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:44:26,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:44:26,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:44:26,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:44:26,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:44:26,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:44:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:44:26,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:44:26,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:44:26,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 13:44:26,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:44:26,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-28 13:44:26,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:44:26,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:44:26,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 13:44:26,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:44:26,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 13:44:26,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:44:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:44:26,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399478609] [2020-10-28 13:44:26,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:44:26,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:44:26,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770978744] [2020-10-28 13:44:26,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:44:26,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:44:26,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:44:26,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:44:26,477 INFO L87 Difference]: Start difference. First operand 1902 states and 2466 transitions. Second operand 8 states. [2020-10-28 13:44:26,655 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 13:44:28,587 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-28 13:44:50,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:44:50,968 INFO L93 Difference]: Finished difference Result 6129 states and 7877 transitions. [2020-10-28 13:44:50,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 13:44:50,974 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-10-28 13:44:50,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:44:50,999 INFO L225 Difference]: With dead ends: 6129 [2020-10-28 13:44:50,999 INFO L226 Difference]: Without dead ends: 3339 [2020-10-28 13:44:51,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-28 13:44:51,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2020-10-28 13:44:51,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3279. [2020-10-28 13:44:51,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3279 states. [2020-10-28 13:44:51,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3279 states to 3279 states and 4006 transitions. [2020-10-28 13:44:51,136 INFO L78 Accepts]: Start accepts. Automaton has 3279 states and 4006 transitions. Word has length 90 [2020-10-28 13:44:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:44:51,137 INFO L481 AbstractCegarLoop]: Abstraction has 3279 states and 4006 transitions. [2020-10-28 13:44:51,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:44:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3279 states and 4006 transitions. [2020-10-28 13:44:51,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-28 13:44:51,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:44:51,155 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-28 13:44:51,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 13:44:51,155 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:44:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:44:51,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1090391767, now seen corresponding path program 1 times [2020-10-28 13:44:51,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:44:51,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745467371] [2020-10-28 13:44:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:44:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:44:51,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:44:51,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:44:52,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:44:52,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-28 13:44:52,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:44:52,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1190 [2020-10-28 13:44:52,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:44:52,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:44:52,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:44:52,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:44:52,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 13:44:52,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:44:52,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:44:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:44:52,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:44:52,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:44:52,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:44:52,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:44:52,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:44:52,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:44:52,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:44:52,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:44:52,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:44:52,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:44:52,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:44:52,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:44:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:44:52,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:44:52,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:44:52,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:44:52,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:44:52,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-28 13:44:52,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:44:52,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:44:52,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:44:52,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:44:52,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:44:52,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:44:52,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:44:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:44:52,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:44:53,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:44:53,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 13:44:53,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:44:53,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-28 13:44:53,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:44:53,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:44:53,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:44:53,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:44:53,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 13:44:53,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:44:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:44:53,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745467371] [2020-10-28 13:44:53,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:44:53,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:44:53,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720559951] [2020-10-28 13:44:53,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:44:53,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:44:53,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:44:53,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:44:53,160 INFO L87 Difference]: Start difference. First operand 3279 states and 4006 transitions. Second operand 7 states. [2020-10-28 13:45:09,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:45:09,378 INFO L93 Difference]: Finished difference Result 7976 states and 10224 transitions. [2020-10-28 13:45:09,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:45:09,380 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 173 [2020-10-28 13:45:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:45:09,415 INFO L225 Difference]: With dead ends: 7976 [2020-10-28 13:45:09,415 INFO L226 Difference]: Without dead ends: 5138 [2020-10-28 13:45:09,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:45:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5138 states. [2020-10-28 13:45:09,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5138 to 5128. [2020-10-28 13:45:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5128 states. [2020-10-28 13:45:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 6284 transitions. [2020-10-28 13:45:09,593 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 6284 transitions. Word has length 173 [2020-10-28 13:45:09,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:45:09,593 INFO L481 AbstractCegarLoop]: Abstraction has 5128 states and 6284 transitions. [2020-10-28 13:45:09,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:45:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 6284 transitions. [2020-10-28 13:45:09,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-28 13:45:09,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:45:09,597 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-28 13:45:09,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 13:45:09,597 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:45:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:45:09,598 INFO L82 PathProgramCache]: Analyzing trace with hash -6332550, now seen corresponding path program 1 times [2020-10-28 13:45:09,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:45:09,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550551081] [2020-10-28 13:45:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:45:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:45:09,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:09,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:10,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:14,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:45:14,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-28 13:45:14,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:45:14,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4477 [2020-10-28 13:45:14,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:45:14,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:45:14,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:45:14,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-28 13:45:14,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 13:45:14,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:45:14,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:45:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:45:14,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:14,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:45:14,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:45:14,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:45:14,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:45:14,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:45:14,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:45:14,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:45:14,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:45:14,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:45:14,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:45:14,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:45:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:45:14,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:14,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:45:14,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:45:14,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:45:14,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 13:45:14,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:45:14,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:45:14,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:45:14,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:45:14,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:45:14,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:45:14,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:45:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:45:14,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:14,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:45:14,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 13:45:14,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:45:14,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-28 13:45:14,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:45:14,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:45:14,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:45:14,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:45:14,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 13:45:14,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:45:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 13:45:14,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550551081] [2020-10-28 13:45:14,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:45:14,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:45:14,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849104900] [2020-10-28 13:45:14,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:45:14,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:45:14,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:45:14,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:45:14,623 INFO L87 Difference]: Start difference. First operand 5128 states and 6284 transitions. Second operand 5 states. [2020-10-28 13:45:38,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:45:38,401 INFO L93 Difference]: Finished difference Result 12096 states and 15445 transitions. [2020-10-28 13:45:38,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:45:38,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2020-10-28 13:45:38,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:45:38,451 INFO L225 Difference]: With dead ends: 12096 [2020-10-28 13:45:38,451 INFO L226 Difference]: Without dead ends: 7409 [2020-10-28 13:45:38,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 13:45:38,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7409 states. [2020-10-28 13:45:38,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7409 to 6945. [2020-10-28 13:45:38,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6945 states. [2020-10-28 13:45:38,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6945 states to 6945 states and 8906 transitions. [2020-10-28 13:45:38,680 INFO L78 Accepts]: Start accepts. Automaton has 6945 states and 8906 transitions. Word has length 178 [2020-10-28 13:45:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:45:38,681 INFO L481 AbstractCegarLoop]: Abstraction has 6945 states and 8906 transitions. [2020-10-28 13:45:38,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:45:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 6945 states and 8906 transitions. [2020-10-28 13:45:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-28 13:45:38,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:45:38,684 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 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] [2020-10-28 13:45:38,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 13:45:38,685 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:45:38,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:45:38,685 INFO L82 PathProgramCache]: Analyzing trace with hash 274633648, now seen corresponding path program 1 times [2020-10-28 13:45:38,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:45:38,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040453822] [2020-10-28 13:45:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:45:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:45:38,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:39,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:39,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:45:39,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-28 13:45:39,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:45:39,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1107 [2020-10-28 13:45:39,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:45:39,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:45:39,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:45:39,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:45:39,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 13:45:39,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:45:40,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:45:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:45:40,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:40,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:45:40,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:45:40,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:45:40,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:45:40,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:45:40,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:45:40,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:45:40,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:45:40,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:45:40,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:45:40,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:45:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:45:40,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:40,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:45:40,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:45:40,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:45:40,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-28 13:45:40,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:45:40,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:45:40,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:45:40,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:45:40,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:45:40,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:45:40,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:45:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:45:40,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:40,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:40,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:45:40,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 13:45:40,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:45:40,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-28 13:45:40,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:45:40,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:45:40,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:45:40,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:45:40,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:45:40,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:45:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-28 13:45:40,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040453822] [2020-10-28 13:45:40,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:45:40,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 13:45:40,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298111815] [2020-10-28 13:45:40,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 13:45:40,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:45:40,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 13:45:40,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:45:40,663 INFO L87 Difference]: Start difference. First operand 6945 states and 8906 transitions. Second operand 6 states. [2020-10-28 13:45:55,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:45:55,735 INFO L93 Difference]: Finished difference Result 13455 states and 17374 transitions. [2020-10-28 13:45:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:45:55,737 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 189 [2020-10-28 13:45:55,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:45:55,773 INFO L225 Difference]: With dead ends: 13455 [2020-10-28 13:45:55,774 INFO L226 Difference]: Without dead ends: 6951 [2020-10-28 13:45:55,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:45:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2020-10-28 13:45:55,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 6945. [2020-10-28 13:45:55,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6945 states. [2020-10-28 13:45:55,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6945 states to 6945 states and 8875 transitions. [2020-10-28 13:45:55,968 INFO L78 Accepts]: Start accepts. Automaton has 6945 states and 8875 transitions. Word has length 189 [2020-10-28 13:45:55,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:45:55,969 INFO L481 AbstractCegarLoop]: Abstraction has 6945 states and 8875 transitions. [2020-10-28 13:45:55,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 13:45:55,969 INFO L276 IsEmpty]: Start isEmpty. Operand 6945 states and 8875 transitions. [2020-10-28 13:45:55,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-28 13:45:55,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:45:55,973 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 13:45:55,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 13:45:55,974 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:45:55,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:45:55,974 INFO L82 PathProgramCache]: Analyzing trace with hash -277988994, now seen corresponding path program 1 times [2020-10-28 13:45:55,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:45:55,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942197298] [2020-10-28 13:45:55,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:45:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:45:56,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:56,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:57,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:45:57,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-28 13:45:57,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:45:57,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1742 [2020-10-28 13:45:57,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:45:57,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:45:57,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:45:57,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:45:57,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-28 13:45:57,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:45:57,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:45:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:45:57,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:57,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:45:57,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:45:57,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:45:57,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 13:45:57,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:45:57,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:45:57,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:45:57,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:45:57,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:45:57,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:45:58,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:45:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:45:58,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:58,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:45:58,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:45:58,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:45:58,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-28 13:45:58,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:45:58,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:45:58,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:45:58,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:45:58,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:45:58,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:45:58,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:45:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:45:58,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:45:58,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:45:58,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 13:45:58,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:45:58,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-28 13:45:58,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:45:58,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:45:58,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:45:58,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:45:58,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-28 13:45:58,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:45:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:45:58,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942197298] [2020-10-28 13:45:58,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:45:58,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:45:58,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777757411] [2020-10-28 13:45:58,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:45:58,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:45:58,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:45:58,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:45:58,642 INFO L87 Difference]: Start difference. First operand 6945 states and 8875 transitions. Second operand 7 states. [2020-10-28 13:46:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:46:18,951 INFO L93 Difference]: Finished difference Result 16026 states and 21216 transitions. [2020-10-28 13:46:18,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:46:18,954 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 223 [2020-10-28 13:46:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:46:18,998 INFO L225 Difference]: With dead ends: 16026 [2020-10-28 13:46:18,998 INFO L226 Difference]: Without dead ends: 9522 [2020-10-28 13:46:19,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:46:19,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9522 states. [2020-10-28 13:46:19,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9522 to 9418. [2020-10-28 13:46:19,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9418 states. [2020-10-28 13:46:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9418 states to 9418 states and 12011 transitions. [2020-10-28 13:46:19,276 INFO L78 Accepts]: Start accepts. Automaton has 9418 states and 12011 transitions. Word has length 223 [2020-10-28 13:46:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:46:19,277 INFO L481 AbstractCegarLoop]: Abstraction has 9418 states and 12011 transitions. [2020-10-28 13:46:19,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:46:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 9418 states and 12011 transitions. [2020-10-28 13:46:19,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-28 13:46:19,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:46:19,283 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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 13:46:19,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 13:46:19,283 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:46:19,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:46:19,284 INFO L82 PathProgramCache]: Analyzing trace with hash 186495271, now seen corresponding path program 1 times [2020-10-28 13:46:19,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:46:19,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657511184] [2020-10-28 13:46:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:46:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:46:19,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:46:19,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:46:20,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:46:22,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:46:24,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:46:24,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-28 13:46:24,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:46:24,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 13:46:24,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:46:24,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:46:24,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:46:24,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-28 13:46:24,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 13:46:24,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:46:24,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:46:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:46:24,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:46:24,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:46:24,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:46:24,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:46:24,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:46:24,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:46:24,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:46:24,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:46:24,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:46:24,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:46:24,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:46:24,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:46:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:46:24,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:46:24,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:46:24,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:46:24,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:46:24,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 13:46:24,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:46:24,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:46:24,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:46:24,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:46:24,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:46:24,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:46:24,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:46:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:46:24,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:46:24,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:46:24,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 13:46:24,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:46:24,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-28 13:46:24,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:46:24,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:46:24,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:46:24,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:46:24,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 13:46:24,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:46:24,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2020-10-28 13:46:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:46:24,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:46:24,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:46:24,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 13:46:24,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:46:24,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-28 13:46:24,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:46:24,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:46:24,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:46:24,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:46:24,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 13:46:24,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:46:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 171 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-10-28 13:46:25,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657511184] [2020-10-28 13:46:25,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:46:25,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:46:25,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835984380] [2020-10-28 13:46:25,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:46:25,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:46:25,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:46:25,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:46:25,170 INFO L87 Difference]: Start difference. First operand 9418 states and 12011 transitions. Second operand 7 states. [2020-10-28 13:46:26,156 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 13:46:59,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:46:59,091 INFO L93 Difference]: Finished difference Result 22176 states and 29504 transitions. [2020-10-28 13:46:59,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:46:59,093 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 252 [2020-10-28 13:46:59,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:46:59,154 INFO L225 Difference]: With dead ends: 22176 [2020-10-28 13:46:59,154 INFO L226 Difference]: Without dead ends: 12713 [2020-10-28 13:46:59,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:46:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12713 states. [2020-10-28 13:46:59,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12713 to 12217. [2020-10-28 13:46:59,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12217 states. [2020-10-28 13:46:59,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12217 states to 12217 states and 16200 transitions. [2020-10-28 13:46:59,517 INFO L78 Accepts]: Start accepts. Automaton has 12217 states and 16200 transitions. Word has length 252 [2020-10-28 13:46:59,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:46:59,518 INFO L481 AbstractCegarLoop]: Abstraction has 12217 states and 16200 transitions. [2020-10-28 13:46:59,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:46:59,519 INFO L276 IsEmpty]: Start isEmpty. Operand 12217 states and 16200 transitions. [2020-10-28 13:46:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-28 13:46:59,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:46:59,524 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:46:59,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 13:46:59,525 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:46:59,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:46:59,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1143509561, now seen corresponding path program 1 times [2020-10-28 13:46:59,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:46:59,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032712681] [2020-10-28 13:46:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:46:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:46:59,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:47:00,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:47:00,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:47:04,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:47:04,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-28 13:47:04,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:47:04,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4769 [2020-10-28 13:47:04,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:47:04,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:47:04,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:47:04,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-28 13:47:04,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 13:47:04,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:47:04,642 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 13:47:04,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:47:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:47:04,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:47:04,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:47:04,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:47:04,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:47:04,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 13:47:04,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:47:04,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:47:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:47:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:47:04,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:47:04,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:47:04,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:47:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:47:04,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:47:04,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:47:04,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:47:04,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:47:04,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 13:47:04,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:47:04,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:47:04,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:47:04,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:47:04,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:47:04,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:47:04,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:47:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:47:04,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:47:04,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:47:04,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 13:47:04,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:47:04,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-28 13:47:04,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:47:04,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:47:04,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:47:04,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:47:04,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:47:04,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:47:04,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-28 13:47:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:47:05,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:47:05,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:47:05,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 13:47:05,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:47:05,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-28 13:47:05,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:47:05,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:47:05,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:47:05,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:47:05,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 13:47:05,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:47:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-28 13:47:05,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032712681] [2020-10-28 13:47:05,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:47:05,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:47:05,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464337379] [2020-10-28 13:47:05,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:47:05,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:47:05,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:47:05,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:47:05,366 INFO L87 Difference]: Start difference. First operand 12217 states and 16200 transitions. Second operand 7 states. [2020-10-28 13:47:12,917 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66