/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/array-examples/standard_copy8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:55:11,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:55:11,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:55:11,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:55:11,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:55:11,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:55:11,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:55:11,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:55:11,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:55:11,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:55:11,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:55:11,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:55:11,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:55:11,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:55:11,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:55:11,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:55:11,756 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:55:11,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:55:11,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:55:11,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:55:11,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:55:11,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:55:11,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:55:11,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:55:11,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:55:11,805 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:55:11,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:55:11,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:55:11,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:55:11,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:55:11,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:55:11,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:55:11,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:55:11,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:55:11,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:55:11,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:55:11,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:55:11,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:55:11,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:55:11,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:55:11,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:55:11,817 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 08:55:11,848 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:55:11,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:55:11,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:55:11,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:55:11,851 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:55:11,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:55:11,851 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:55:11,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:55:11,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:55:11,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:55:11,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:55:11,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:55:11,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:55:11,853 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:55:11,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:55:11,853 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:55:11,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:55:11,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:55:11,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:55:11,854 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:55:11,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:55:11,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:55:11,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:55:11,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:55:11,855 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:55:11,856 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:55:11,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:55:11,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:55:11,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:55:11,856 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:55:12,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:55:12,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:55:12,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:55:12,300 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:55:12,301 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:55:12,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i [2020-10-28 08:55:12,403 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0e9fb2e33/e6ac19370db141e2845a4fff2062be40/FLAG8a1ac6204 [2020-10-28 08:55:13,089 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:55:13,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i [2020-10-28 08:55:13,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0e9fb2e33/e6ac19370db141e2845a4fff2062be40/FLAG8a1ac6204 [2020-10-28 08:55:13,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0e9fb2e33/e6ac19370db141e2845a4fff2062be40 [2020-10-28 08:55:13,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:55:13,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:55:13,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:55:13,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:55:13,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:55:13,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:55:13" (1/1) ... [2020-10-28 08:55:13,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12ffc228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:13, skipping insertion in model container [2020-10-28 08:55:13,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:55:13" (1/1) ... [2020-10-28 08:55:13,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:55:13,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:55:13,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:55:13,710 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:55:13,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:55:13,761 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:55:13,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:13 WrapperNode [2020-10-28 08:55:13,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:55:13,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:55:13,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:55:13,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:55:13,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:13" (1/1) ... [2020-10-28 08:55:13,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:13" (1/1) ... [2020-10-28 08:55:13,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:13" (1/1) ... [2020-10-28 08:55:13,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:13" (1/1) ... [2020-10-28 08:55:13,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:13" (1/1) ... [2020-10-28 08:55:13,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:13" (1/1) ... [2020-10-28 08:55:13,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:13" (1/1) ... [2020-10-28 08:55:13,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:55:13,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:55:13,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:55:13,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:55:13,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:13" (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 08:55:13,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:55:13,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:55:13,902 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:55:13,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:55:13,902 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:55:13,902 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:55:13,902 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:55:13,903 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:55:13,903 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:55:13,903 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:55:13,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:55:13,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:55:13,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:55:13,904 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:55:13,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:55:13,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:55:13,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:55:13,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:55:13,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:55:13,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:55:14,518 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:55:14,518 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-28 08:55:14,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:55:14 BoogieIcfgContainer [2020-10-28 08:55:14,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:55:14,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:55:14,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:55:14,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:55:14,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:55:13" (1/3) ... [2020-10-28 08:55:14,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c0f3a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:55:14, skipping insertion in model container [2020-10-28 08:55:14,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:13" (2/3) ... [2020-10-28 08:55:14,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c0f3a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:55:14, skipping insertion in model container [2020-10-28 08:55:14,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:55:14" (3/3) ... [2020-10-28 08:55:14,531 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-2.i [2020-10-28 08:55:14,544 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:55:14,550 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:55:14,565 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:55:14,597 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:55:14,597 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:55:14,597 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:55:14,597 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:55:14,597 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:55:14,598 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:55:14,598 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:55:14,598 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:55:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2020-10-28 08:55:14,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 08:55:14,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:14,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:14,628 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:14,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:14,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1242794554, now seen corresponding path program 1 times [2020-10-28 08:55:14,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:14,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972309001] [2020-10-28 08:55:14,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:14,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:14,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:14,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:15,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:15,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:15,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:15,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:15,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:15,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:17,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:17,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 08:55:17,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 08:55:17,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2995 [2020-10-28 08:55:17,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:17,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 08:55:17,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:17,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 08:55:17,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:17,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:17,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:17,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:17,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:17,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:55:17,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:17,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:17,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:17,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:17,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:17,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:17,967 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 08:55:17,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972309001] [2020-10-28 08:55:17,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:55:17,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:55:17,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256243898] [2020-10-28 08:55:17,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:55:17,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:18,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:55:18,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:55:18,010 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 3 states. [2020-10-28 08:55:18,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:18,238 INFO L93 Difference]: Finished difference Result 95 states and 137 transitions. [2020-10-28 08:55:18,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:55:18,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-28 08:55:18,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:18,253 INFO L225 Difference]: With dead ends: 95 [2020-10-28 08:55:18,253 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 08:55:18,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:55:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 08:55:18,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-28 08:55:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 08:55:18,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2020-10-28 08:55:18,304 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 31 [2020-10-28 08:55:18,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:18,305 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2020-10-28 08:55:18,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:55:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2020-10-28 08:55:18,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 08:55:18,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:18,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:18,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:55:18,307 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:18,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:18,308 INFO L82 PathProgramCache]: Analyzing trace with hash 443594030, now seen corresponding path program 1 times [2020-10-28 08:55:18,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:18,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160919953] [2020-10-28 08:55:18,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:18,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:23,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 08:55:23,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 08:55:23,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:55:23,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:23,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:23,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:55:23,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 08:55:23,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:55:23,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:23,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:23,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:23,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:23,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:23,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:55:23,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:23,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:23,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:23,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:23,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:23,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:23,409 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 08:55:23,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160919953] [2020-10-28 08:55:23,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:55:23,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:55:23,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223135881] [2020-10-28 08:55:23,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:55:23,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:23,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:55:23,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:55:23,414 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 4 states. [2020-10-28 08:55:23,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:23,614 INFO L93 Difference]: Finished difference Result 95 states and 119 transitions. [2020-10-28 08:55:23,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:55:23,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-28 08:55:23,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:23,617 INFO L225 Difference]: With dead ends: 95 [2020-10-28 08:55:23,617 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 08:55:23,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:55:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 08:55:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-10-28 08:55:23,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 08:55:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-10-28 08:55:23,633 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 31 [2020-10-28 08:55:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:23,633 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-10-28 08:55:23,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:55:23,634 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-10-28 08:55:23,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 08:55:23,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:23,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:23,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:55:23,641 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:23,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:23,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2114218722, now seen corresponding path program 1 times [2020-10-28 08:55:23,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:23,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049259816] [2020-10-28 08:55:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:23,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:24,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:25,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:28,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:28,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 08:55:28,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:55:28,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:55:28,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:28,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:28,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:55:28,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 08:55:28,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:55:28,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:28,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:28,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:28,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:28,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:28,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:28,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 08:55:28,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:28,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:28,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:28,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:28,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:28,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 08:55:28,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049259816] [2020-10-28 08:55:28,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:28,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:55:28,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713604445] [2020-10-28 08:55:28,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:55:28,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:28,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:55:28,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:28,761 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 5 states. [2020-10-28 08:55:29,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:29,020 INFO L93 Difference]: Finished difference Result 118 states and 142 transitions. [2020-10-28 08:55:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:55:29,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-28 08:55:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:29,022 INFO L225 Difference]: With dead ends: 118 [2020-10-28 08:55:29,022 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 08:55:29,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:29,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 08:55:29,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2020-10-28 08:55:29,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 08:55:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2020-10-28 08:55:29,035 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 47 [2020-10-28 08:55:29,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:29,035 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2020-10-28 08:55:29,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:55:29,036 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2020-10-28 08:55:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:55:29,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:29,038 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:55:29,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:55:29,038 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:29,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:29,039 INFO L82 PathProgramCache]: Analyzing trace with hash 926373134, now seen corresponding path program 2 times [2020-10-28 08:55:29,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:29,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189391038] [2020-10-28 08:55:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:29,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:29,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:29,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:29,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:29,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:29,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:29,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:34,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 08:55:34,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:55:34,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:55:34,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:34,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:34,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:55:34,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:34,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:55:34,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:34,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:34,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:34,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:34,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:34,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:34,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:34,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:34,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:34,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:34,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:34,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-28 08:55:34,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189391038] [2020-10-28 08:55:34,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:55:34,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:55:34,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880303541] [2020-10-28 08:55:34,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:55:34,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:34,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:55:34,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:55:34,155 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 4 states. [2020-10-28 08:55:34,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:34,296 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2020-10-28 08:55:34,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:55:34,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-28 08:55:34,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:34,298 INFO L225 Difference]: With dead ends: 132 [2020-10-28 08:55:34,298 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 08:55:34,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:55:34,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 08:55:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-28 08:55:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 08:55:34,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-28 08:55:34,309 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 63 [2020-10-28 08:55:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:34,309 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-28 08:55:34,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:55:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-28 08:55:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 08:55:34,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:34,314 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:55:34,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:55:34,315 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:34,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:34,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1026858900, now seen corresponding path program 1 times [2020-10-28 08:55:34,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:34,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173897099] [2020-10-28 08:55:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:34,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:35,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:39,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 08:55:39,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:55:39,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 08:55:39,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:39,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:39,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:55:39,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 08:55:39,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:55:39,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:39,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:39,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:39,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:39,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:39,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:55:39,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:39,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:39,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:39,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:39,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:39,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-28 08:55:39,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173897099] [2020-10-28 08:55:39,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:39,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:55:39,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028951914] [2020-10-28 08:55:39,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:55:39,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:39,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:55:39,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:39,463 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 6 states. [2020-10-28 08:55:39,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:39,725 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2020-10-28 08:55:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:55:39,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-28 08:55:39,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:39,728 INFO L225 Difference]: With dead ends: 149 [2020-10-28 08:55:39,728 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 08:55:39,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:39,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 08:55:39,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2020-10-28 08:55:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 08:55:39,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2020-10-28 08:55:39,749 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 65 [2020-10-28 08:55:39,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:39,749 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2020-10-28 08:55:39,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:55:39,749 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2020-10-28 08:55:39,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 08:55:39,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:39,755 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:55:39,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:55:39,756 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:39,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:39,757 INFO L82 PathProgramCache]: Analyzing trace with hash -635337636, now seen corresponding path program 2 times [2020-10-28 08:55:39,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:39,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526748224] [2020-10-28 08:55:39,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:39,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:44,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:44,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:44,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 08:55:44,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:55:44,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 08:55:44,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:44,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:44,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:55:44,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:44,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:55:44,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:44,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:44,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:44,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:44,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:44,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:44,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:44,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:44,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:44,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:44,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:44,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:44,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 08:55:44,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526748224] [2020-10-28 08:55:44,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:44,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:55:44,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167837301] [2020-10-28 08:55:44,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:55:44,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:44,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:55:44,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:44,934 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 5 states. [2020-10-28 08:55:45,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:45,093 INFO L93 Difference]: Finished difference Result 166 states and 184 transitions. [2020-10-28 08:55:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:55:45,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2020-10-28 08:55:45,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:45,096 INFO L225 Difference]: With dead ends: 166 [2020-10-28 08:55:45,096 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 08:55:45,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:45,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 08:55:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-28 08:55:45,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 08:55:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2020-10-28 08:55:45,119 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 81 [2020-10-28 08:55:45,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:45,120 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2020-10-28 08:55:45,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:55:45,120 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2020-10-28 08:55:45,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 08:55:45,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:45,123 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 08:55:45,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:55:45,123 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:45,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:45,126 INFO L82 PathProgramCache]: Analyzing trace with hash -8866758, now seen corresponding path program 3 times [2020-10-28 08:55:45,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:45,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356287990] [2020-10-28 08:55:45,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:45,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:45,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:45,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:45,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:45,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:45,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:50,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:50,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 08:55:50,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:50,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 08:55:50,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:50,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:50,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:55:50,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 08:55:50,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:55:50,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:50,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:50,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:50,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:50,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:50,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:50,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:55:50,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:50,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:50,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:50,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:50,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:50,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-28 08:55:50,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356287990] [2020-10-28 08:55:50,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:50,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:55:50,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594679375] [2020-10-28 08:55:50,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:55:50,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:50,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:55:50,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:50,281 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 7 states. [2020-10-28 08:55:50,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:50,608 INFO L93 Difference]: Finished difference Result 181 states and 205 transitions. [2020-10-28 08:55:50,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:55:50,608 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-28 08:55:50,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:50,610 INFO L225 Difference]: With dead ends: 181 [2020-10-28 08:55:50,610 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 08:55:50,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:50,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 08:55:50,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-10-28 08:55:50,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 08:55:50,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 113 transitions. [2020-10-28 08:55:50,632 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 113 transitions. Word has length 83 [2020-10-28 08:55:50,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:50,632 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 113 transitions. [2020-10-28 08:55:50,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:55:50,632 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 113 transitions. [2020-10-28 08:55:50,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 08:55:50,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:50,634 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-28 08:55:50,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:55:50,634 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:50,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:50,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1158167594, now seen corresponding path program 4 times [2020-10-28 08:55:50,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:50,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932213896] [2020-10-28 08:55:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:50,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:50,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:50,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:50,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:50,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:50,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:55,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:55,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 08:55:55,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:55,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 08:55:55,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:55,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:55,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:55:55,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:55:55,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:55:55,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:55,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:55,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:55,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:55,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:55,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:55,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:55,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:55,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:55,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-10-28 08:55:55,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932213896] [2020-10-28 08:55:55,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:55,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:55:55,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64500006] [2020-10-28 08:55:55,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:55:55,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:55,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:55:55,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:55:55,819 INFO L87 Difference]: Start difference. First operand 104 states and 113 transitions. Second operand 8 states. [2020-10-28 08:55:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:56,161 INFO L93 Difference]: Finished difference Result 211 states and 235 transitions. [2020-10-28 08:55:56,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:55:56,162 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2020-10-28 08:55:56,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:56,163 INFO L225 Difference]: With dead ends: 211 [2020-10-28 08:55:56,163 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 08:55:56,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:55:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 08:55:56,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-10-28 08:55:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 08:55:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2020-10-28 08:55:56,183 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 99 [2020-10-28 08:55:56,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:56,184 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2020-10-28 08:55:56,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:55:56,184 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2020-10-28 08:55:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 08:55:56,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:56,189 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-28 08:55:56,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:55:56,189 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:56,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:56,190 INFO L82 PathProgramCache]: Analyzing trace with hash -2085051366, now seen corresponding path program 5 times [2020-10-28 08:55:56,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:56,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399377551] [2020-10-28 08:55:56,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:56,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:56,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:56,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:56,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:56,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:56,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:01,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:01,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 08:56:01,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:01,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:56:01,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:01,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:01,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:56:01,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:01,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:56:01,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:01,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:01,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:01,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:01,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:01,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:01,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:56:01,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:01,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:01,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-28 08:56:01,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399377551] [2020-10-28 08:56:01,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:01,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:56:01,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201834160] [2020-10-28 08:56:01,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:56:01,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:01,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:56:01,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:56:01,338 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand 6 states. [2020-10-28 08:56:01,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:01,477 INFO L93 Difference]: Finished difference Result 232 states and 250 transitions. [2020-10-28 08:56:01,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:56:01,478 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-10-28 08:56:01,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:01,481 INFO L225 Difference]: With dead ends: 232 [2020-10-28 08:56:01,481 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 08:56:01,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:56:01,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 08:56:01,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-28 08:56:01,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 08:56:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2020-10-28 08:56:01,501 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 115 [2020-10-28 08:56:01,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:01,502 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2020-10-28 08:56:01,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:56:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2020-10-28 08:56:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 08:56:01,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:01,504 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 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 08:56:01,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:56:01,504 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:01,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1904583560, now seen corresponding path program 6 times [2020-10-28 08:56:01,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:01,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158694572] [2020-10-28 08:56:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:01,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:01,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:01,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:01,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:01,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:02,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:06,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:06,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 08:56:06,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:06,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 08:56:06,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:06,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:06,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:56:06,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 08:56:06,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:56:06,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:06,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:06,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:06,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:06,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:06,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:06,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:06,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:06,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:06,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:06,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:06,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:06,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-10-28 08:56:06,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158694572] [2020-10-28 08:56:06,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:06,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:56:06,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220291085] [2020-10-28 08:56:06,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:56:06,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:06,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:56:06,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:56:06,691 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand 9 states. [2020-10-28 08:56:07,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:07,171 INFO L93 Difference]: Finished difference Result 243 states and 267 transitions. [2020-10-28 08:56:07,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:56:07,171 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 117 [2020-10-28 08:56:07,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:07,172 INFO L225 Difference]: With dead ends: 243 [2020-10-28 08:56:07,173 INFO L226 Difference]: Without dead ends: 146 [2020-10-28 08:56:07,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:56:07,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-28 08:56:07,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2020-10-28 08:56:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 08:56:07,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 147 transitions. [2020-10-28 08:56:07,196 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 147 transitions. Word has length 117 [2020-10-28 08:56:07,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:07,196 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 147 transitions. [2020-10-28 08:56:07,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:56:07,196 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 147 transitions. [2020-10-28 08:56:07,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 08:56:07,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:07,199 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 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 08:56:07,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:56:07,199 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:07,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:07,200 INFO L82 PathProgramCache]: Analyzing trace with hash -675600280, now seen corresponding path program 7 times [2020-10-28 08:56:07,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:07,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6501228] [2020-10-28 08:56:07,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:07,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:07,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:07,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:07,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:07,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:08,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:12,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:12,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-28 08:56:12,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:12,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:56:12,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:12,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:56:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:56:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:56:12,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:12,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:12,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:12,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:12,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:12,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:12,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:12,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:12,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:12,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:12,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:12,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:12,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-10-28 08:56:12,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6501228] [2020-10-28 08:56:12,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:12,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:56:12,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44478800] [2020-10-28 08:56:12,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:56:12,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:12,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:56:12,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:56:12,388 INFO L87 Difference]: Start difference. First operand 138 states and 147 transitions. Second operand 10 states. [2020-10-28 08:56:12,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:12,845 INFO L93 Difference]: Finished difference Result 273 states and 297 transitions. [2020-10-28 08:56:12,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:56:12,846 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-10-28 08:56:12,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:12,847 INFO L225 Difference]: With dead ends: 273 [2020-10-28 08:56:12,847 INFO L226 Difference]: Without dead ends: 162 [2020-10-28 08:56:12,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:56:12,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-28 08:56:12,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2020-10-28 08:56:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-28 08:56:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 163 transitions. [2020-10-28 08:56:12,861 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 163 transitions. Word has length 133 [2020-10-28 08:56:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:12,862 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 163 transitions. [2020-10-28 08:56:12,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:56:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 163 transitions. [2020-10-28 08:56:12,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 08:56:12,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:12,864 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 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 08:56:12,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:56:12,864 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:12,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:12,865 INFO L82 PathProgramCache]: Analyzing trace with hash -241904552, now seen corresponding path program 8 times [2020-10-28 08:56:12,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:12,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969891315] [2020-10-28 08:56:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:12,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:12,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:13,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:13,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:13,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:13,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:18,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:18,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 08:56:18,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:18,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5130 [2020-10-28 08:56:18,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:18,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:18,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:56:18,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:18,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:56:18,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:18,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:18,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:18,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:18,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:18,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:18,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:56:18,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:18,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:18,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:18,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:18,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:18,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-28 08:56:18,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969891315] [2020-10-28 08:56:18,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:18,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:56:18,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832365113] [2020-10-28 08:56:18,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:56:18,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:18,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:56:18,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:56:18,146 INFO L87 Difference]: Start difference. First operand 154 states and 163 transitions. Second operand 7 states. [2020-10-28 08:56:18,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:18,290 INFO L93 Difference]: Finished difference Result 298 states and 316 transitions. [2020-10-28 08:56:18,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:56:18,290 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 149 [2020-10-28 08:56:18,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:18,292 INFO L225 Difference]: With dead ends: 298 [2020-10-28 08:56:18,292 INFO L226 Difference]: Without dead ends: 157 [2020-10-28 08:56:18,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:56:18,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-28 08:56:18,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-28 08:56:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 08:56:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 165 transitions. [2020-10-28 08:56:18,300 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 165 transitions. Word has length 149 [2020-10-28 08:56:18,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:18,301 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 165 transitions. [2020-10-28 08:56:18,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:56:18,301 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 165 transitions. [2020-10-28 08:56:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-28 08:56:18,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:18,303 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 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 08:56:18,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:56:18,303 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:18,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:18,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1719732938, now seen corresponding path program 9 times [2020-10-28 08:56:18,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:18,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618323462] [2020-10-28 08:56:18,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:18,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:18,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:18,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:18,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:18,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:19,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:23,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:23,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 08:56:23,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:23,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-10-28 08:56:23,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:23,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:23,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:56:23,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:56:23,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:56:23,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:23,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:23,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:23,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:23,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:23,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:23,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:56:23,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:23,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:23,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:23,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:23,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:23,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2020-10-28 08:56:23,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618323462] [2020-10-28 08:56:23,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:23,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:56:23,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118683595] [2020-10-28 08:56:23,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:56:23,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:23,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:56:23,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:56:23,635 INFO L87 Difference]: Start difference. First operand 156 states and 165 transitions. Second operand 11 states. [2020-10-28 08:56:24,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:24,202 INFO L93 Difference]: Finished difference Result 305 states and 329 transitions. [2020-10-28 08:56:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:56:24,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 151 [2020-10-28 08:56:24,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:24,205 INFO L225 Difference]: With dead ends: 305 [2020-10-28 08:56:24,205 INFO L226 Difference]: Without dead ends: 180 [2020-10-28 08:56:24,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:56:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-28 08:56:24,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2020-10-28 08:56:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-28 08:56:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 181 transitions. [2020-10-28 08:56:24,215 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 181 transitions. Word has length 151 [2020-10-28 08:56:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:24,215 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 181 transitions. [2020-10-28 08:56:24,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:56:24,216 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 181 transitions. [2020-10-28 08:56:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-28 08:56:24,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:24,218 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 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 08:56:24,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:56:24,218 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:24,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:24,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1266678490, now seen corresponding path program 10 times [2020-10-28 08:56:24,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:24,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904564353] [2020-10-28 08:56:24,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:24,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:24,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:24,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:24,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:24,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:25,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:29,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:29,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-28 08:56:29,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:29,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5117 [2020-10-28 08:56:29,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:29,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:29,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:56:29,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:29,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:56:29,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:29,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:29,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:29,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:29,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:29,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:29,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:29,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:29,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:29,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:29,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:29,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:29,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-28 08:56:29,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904564353] [2020-10-28 08:56:29,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:29,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:56:29,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567045709] [2020-10-28 08:56:29,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:56:29,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:29,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:56:29,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:56:29,489 INFO L87 Difference]: Start difference. First operand 172 states and 181 transitions. Second operand 8 states. [2020-10-28 08:56:29,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:29,664 INFO L93 Difference]: Finished difference Result 332 states and 350 transitions. [2020-10-28 08:56:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:56:29,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 167 [2020-10-28 08:56:29,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:29,666 INFO L225 Difference]: With dead ends: 332 [2020-10-28 08:56:29,666 INFO L226 Difference]: Without dead ends: 175 [2020-10-28 08:56:29,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:56:29,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-28 08:56:29,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2020-10-28 08:56:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 08:56:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 183 transitions. [2020-10-28 08:56:29,677 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 183 transitions. Word has length 167 [2020-10-28 08:56:29,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:29,677 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 183 transitions. [2020-10-28 08:56:29,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:56:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 183 transitions. [2020-10-28 08:56:29,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-28 08:56:29,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:29,681 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 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 08:56:29,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:56:29,681 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:29,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:29,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1679627644, now seen corresponding path program 11 times [2020-10-28 08:56:29,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:29,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444058128] [2020-10-28 08:56:29,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:29,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:29,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:29,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:29,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:29,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:29,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:34,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:34,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-28 08:56:34,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:34,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 08:56:34,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:34,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:34,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:56:34,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 08:56:34,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:56:34,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:34,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:34,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:34,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:34,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:34,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:34,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:34,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:34,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:34,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:34,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:34,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:34,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-10-28 08:56:34,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444058128] [2020-10-28 08:56:34,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:34,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:56:34,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048237569] [2020-10-28 08:56:34,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:56:34,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:34,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:56:34,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:56:34,943 INFO L87 Difference]: Start difference. First operand 174 states and 183 transitions. Second operand 12 states. [2020-10-28 08:56:35,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:35,536 INFO L93 Difference]: Finished difference Result 337 states and 361 transitions. [2020-10-28 08:56:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:56:35,536 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 169 [2020-10-28 08:56:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:35,538 INFO L225 Difference]: With dead ends: 337 [2020-10-28 08:56:35,538 INFO L226 Difference]: Without dead ends: 198 [2020-10-28 08:56:35,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:56:35,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-28 08:56:35,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 190. [2020-10-28 08:56:35,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-28 08:56:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 199 transitions. [2020-10-28 08:56:35,547 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 199 transitions. Word has length 169 [2020-10-28 08:56:35,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:35,547 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 199 transitions. [2020-10-28 08:56:35,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:56:35,547 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 199 transitions. [2020-10-28 08:56:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-28 08:56:35,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:35,549 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 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 08:56:35,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:56:35,550 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:35,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:35,550 INFO L82 PathProgramCache]: Analyzing trace with hash -18194828, now seen corresponding path program 12 times [2020-10-28 08:56:35,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:35,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622626809] [2020-10-28 08:56:35,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:35,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:35,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:35,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:35,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:35,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:37,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:40,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:40,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-28 08:56:40,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:40,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5084 [2020-10-28 08:56:40,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:40,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:40,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:56:40,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 08:56:40,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:56:40,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:40,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:40,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:40,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:40,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:40,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:40,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:40,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:40,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:40,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:40,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:40,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:40,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2020-10-28 08:56:40,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622626809] [2020-10-28 08:56:40,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:40,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:56:40,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570074203] [2020-10-28 08:56:40,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:56:40,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:40,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:56:40,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:56:40,878 INFO L87 Difference]: Start difference. First operand 190 states and 199 transitions. Second operand 13 states. [2020-10-28 08:56:41,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:41,533 INFO L93 Difference]: Finished difference Result 367 states and 391 transitions. [2020-10-28 08:56:41,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:56:41,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 185 [2020-10-28 08:56:41,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:41,536 INFO L225 Difference]: With dead ends: 367 [2020-10-28 08:56:41,536 INFO L226 Difference]: Without dead ends: 214 [2020-10-28 08:56:41,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:56:41,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-28 08:56:41,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 206. [2020-10-28 08:56:41,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-28 08:56:41,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 215 transitions. [2020-10-28 08:56:41,546 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 215 transitions. Word has length 185 [2020-10-28 08:56:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:41,546 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 215 transitions. [2020-10-28 08:56:41,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:56:41,546 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 215 transitions. [2020-10-28 08:56:41,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-28 08:56:41,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:41,548 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 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 08:56:41,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:56:41,549 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:41,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1442493028, now seen corresponding path program 13 times [2020-10-28 08:56:41,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:41,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605785244] [2020-10-28 08:56:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:41,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:41,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:41,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:41,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:41,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:43,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:46,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:46,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-28 08:56:46,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:46,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5100 [2020-10-28 08:56:46,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:46,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:56:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:56:46,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:46,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:46,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:46,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:46,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:46,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:46,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:46,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:46,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:46,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:46,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:46,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:46,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-28 08:56:46,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605785244] [2020-10-28 08:56:46,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:46,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:56:46,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676689030] [2020-10-28 08:56:46,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:56:46,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:46,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:56:46,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:56:46,827 INFO L87 Difference]: Start difference. First operand 206 states and 215 transitions. Second operand 9 states. [2020-10-28 08:56:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:47,034 INFO L93 Difference]: Finished difference Result 398 states and 416 transitions. [2020-10-28 08:56:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:56:47,035 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 201 [2020-10-28 08:56:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:47,037 INFO L225 Difference]: With dead ends: 398 [2020-10-28 08:56:47,037 INFO L226 Difference]: Without dead ends: 209 [2020-10-28 08:56:47,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:56:47,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-28 08:56:47,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2020-10-28 08:56:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-28 08:56:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 217 transitions. [2020-10-28 08:56:47,049 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 217 transitions. Word has length 201 [2020-10-28 08:56:47,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:47,050 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 217 transitions. [2020-10-28 08:56:47,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:56:47,050 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 217 transitions. [2020-10-28 08:56:47,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-28 08:56:47,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:47,051 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 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 08:56:47,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:56:47,052 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:47,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:47,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1946501054, now seen corresponding path program 14 times [2020-10-28 08:56:47,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:47,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177091702] [2020-10-28 08:56:47,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:47,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:47,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:47,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:47,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:47,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:49,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:52,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:52,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-28 08:56:52,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:52,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 08:56:52,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:52,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:52,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:56:52,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-28 08:56:52,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:56:52,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:52,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:52,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:52,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:52,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:52,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:52,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:56:52,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:52,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:52,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:52,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:52,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:52,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2020-10-28 08:56:52,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177091702] [2020-10-28 08:56:52,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:52,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:56:52,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780355504] [2020-10-28 08:56:52,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:56:52,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:52,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:56:52,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:56:52,360 INFO L87 Difference]: Start difference. First operand 208 states and 217 transitions. Second operand 14 states. [2020-10-28 08:56:53,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:53,032 INFO L93 Difference]: Finished difference Result 399 states and 423 transitions. [2020-10-28 08:56:53,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:56:53,033 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 203 [2020-10-28 08:56:53,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:53,035 INFO L225 Difference]: With dead ends: 399 [2020-10-28 08:56:53,035 INFO L226 Difference]: Without dead ends: 232 [2020-10-28 08:56:53,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:56:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-28 08:56:53,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-10-28 08:56:53,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-28 08:56:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 233 transitions. [2020-10-28 08:56:53,047 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 233 transitions. Word has length 203 [2020-10-28 08:56:53,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:53,047 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 233 transitions. [2020-10-28 08:56:53,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:56:53,047 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 233 transitions. [2020-10-28 08:56:53,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-28 08:56:53,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:53,049 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 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 08:56:53,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:56:53,049 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:53,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:53,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1406633934, now seen corresponding path program 15 times [2020-10-28 08:56:53,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:53,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803871286] [2020-10-28 08:56:53,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:53,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:53,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:53,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:53,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:53,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:55,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:58,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:58,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-28 08:56:58,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:58,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5159 [2020-10-28 08:56:58,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:58,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:58,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:56:58,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:58,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:56:58,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:58,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:58,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:58,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:58,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:58,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:58,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:58,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:58,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:58,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:58,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:58,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:58,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1004 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-28 08:56:58,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803871286] [2020-10-28 08:56:58,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:58,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:56:58,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974283632] [2020-10-28 08:56:58,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:56:58,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:58,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:56:58,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:56:58,402 INFO L87 Difference]: Start difference. First operand 224 states and 233 transitions. Second operand 10 states. [2020-10-28 08:56:58,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:58,590 INFO L93 Difference]: Finished difference Result 432 states and 450 transitions. [2020-10-28 08:56:58,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:56:58,590 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 219 [2020-10-28 08:56:58,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:58,593 INFO L225 Difference]: With dead ends: 432 [2020-10-28 08:56:58,593 INFO L226 Difference]: Without dead ends: 227 [2020-10-28 08:56:58,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:56:58,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-28 08:56:58,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2020-10-28 08:56:58,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-28 08:56:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 235 transitions. [2020-10-28 08:56:58,614 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 235 transitions. Word has length 219 [2020-10-28 08:56:58,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:58,614 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 235 transitions. [2020-10-28 08:56:58,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:56:58,614 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 235 transitions. [2020-10-28 08:56:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-28 08:56:58,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:58,617 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 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 08:56:58,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:56:58,617 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:58,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1658849936, now seen corresponding path program 16 times [2020-10-28 08:56:58,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:58,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119680205] [2020-10-28 08:56:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:58,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:58,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:58,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:58,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:58,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:01,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:03,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:03,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 08:57:03,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:57:03,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5107 [2020-10-28 08:57:03,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:03,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:03,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:57:03,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 08:57:03,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:57:03,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:04,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:04,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:04,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:04,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:04,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:04,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:04,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:04,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:04,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:04,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:04,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:04,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked. [2020-10-28 08:57:04,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119680205] [2020-10-28 08:57:04,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:04,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:57:04,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394456150] [2020-10-28 08:57:04,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:57:04,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:04,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:57:04,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:57:04,035 INFO L87 Difference]: Start difference. First operand 226 states and 235 transitions. Second operand 15 states. [2020-10-28 08:57:04,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:04,787 INFO L93 Difference]: Finished difference Result 431 states and 455 transitions. [2020-10-28 08:57:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:57:04,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 221 [2020-10-28 08:57:04,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:04,789 INFO L225 Difference]: With dead ends: 431 [2020-10-28 08:57:04,789 INFO L226 Difference]: Without dead ends: 250 [2020-10-28 08:57:04,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:57:04,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-28 08:57:04,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 242. [2020-10-28 08:57:04,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-28 08:57:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 251 transitions. [2020-10-28 08:57:04,807 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 251 transitions. Word has length 221 [2020-10-28 08:57:04,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:04,808 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 251 transitions. [2020-10-28 08:57:04,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:57:04,808 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 251 transitions. [2020-10-28 08:57:04,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-28 08:57:04,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:04,810 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 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 08:57:04,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:57:04,810 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:04,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:04,811 INFO L82 PathProgramCache]: Analyzing trace with hash 495593088, now seen corresponding path program 17 times [2020-10-28 08:57:04,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:04,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348945576] [2020-10-28 08:57:04,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:04,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:04,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:05,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:05,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:05,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:10,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:10,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-28 08:57:10,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:10,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5230 [2020-10-28 08:57:10,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:10,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:10,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:57:10,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 08:57:10,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:57:10,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:10,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:10,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:10,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:10,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:10,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:10,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:10,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:10,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:10,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:10,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:10,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:10,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2020-10-28 08:57:10,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348945576] [2020-10-28 08:57:10,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:10,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:57:10,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814405790] [2020-10-28 08:57:10,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:57:10,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:10,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:57:10,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:57:10,369 INFO L87 Difference]: Start difference. First operand 242 states and 251 transitions. Second operand 16 states. [2020-10-28 08:57:11,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:11,163 INFO L93 Difference]: Finished difference Result 461 states and 485 transitions. [2020-10-28 08:57:11,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:57:11,164 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 237 [2020-10-28 08:57:11,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:11,166 INFO L225 Difference]: With dead ends: 461 [2020-10-28 08:57:11,166 INFO L226 Difference]: Without dead ends: 266 [2020-10-28 08:57:11,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:57:11,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-28 08:57:11,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 258. [2020-10-28 08:57:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-28 08:57:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 267 transitions. [2020-10-28 08:57:11,187 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 267 transitions. Word has length 237 [2020-10-28 08:57:11,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:11,189 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 267 transitions. [2020-10-28 08:57:11,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:57:11,189 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 267 transitions. [2020-10-28 08:57:11,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-28 08:57:11,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:11,191 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 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 08:57:11,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:57:11,192 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:11,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:11,193 INFO L82 PathProgramCache]: Analyzing trace with hash -609410448, now seen corresponding path program 18 times [2020-10-28 08:57:11,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:11,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060296554] [2020-10-28 08:57:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:11,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:11,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:11,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:11,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:11,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:16,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:16,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-28 08:57:16,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:16,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5614 [2020-10-28 08:57:16,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:16,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:16,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:57:16,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:16,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:57:16,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:16,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:16,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:16,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:16,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:16,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:16,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:16,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:16,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:16,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:16,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:16,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:16,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-28 08:57:17,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060296554] [2020-10-28 08:57:17,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:17,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:57:17,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385282238] [2020-10-28 08:57:17,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:57:17,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:17,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:57:17,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:57:17,035 INFO L87 Difference]: Start difference. First operand 258 states and 267 transitions. Second operand 11 states. [2020-10-28 08:57:17,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:17,214 INFO L93 Difference]: Finished difference Result 498 states and 516 transitions. [2020-10-28 08:57:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:57:17,217 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 253 [2020-10-28 08:57:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:17,219 INFO L225 Difference]: With dead ends: 498 [2020-10-28 08:57:17,219 INFO L226 Difference]: Without dead ends: 261 [2020-10-28 08:57:17,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:57:17,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-28 08:57:17,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2020-10-28 08:57:17,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-28 08:57:17,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 269 transitions. [2020-10-28 08:57:17,231 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 269 transitions. Word has length 253 [2020-10-28 08:57:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:17,232 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 269 transitions. [2020-10-28 08:57:17,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:57:17,232 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 269 transitions. [2020-10-28 08:57:17,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-28 08:57:17,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:17,233 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 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 08:57:17,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:57:17,234 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:17,234 INFO L82 PathProgramCache]: Analyzing trace with hash -2053726898, now seen corresponding path program 19 times [2020-10-28 08:57:17,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:17,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481905508] [2020-10-28 08:57:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:17,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:17,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:17,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:17,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:17,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:17,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:22,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:22,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-28 08:57:22,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:57:22,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:57:22,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:22,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:22,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:57:22,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:57:22,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:57:22,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:22,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:22,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:22,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:22,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:22,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:22,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:57:22,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:22,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:22,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:22,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:22,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:22,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-28 08:57:22,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481905508] [2020-10-28 08:57:22,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:22,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:57:22,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077720840] [2020-10-28 08:57:22,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:57:22,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:22,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:57:22,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:57:22,578 INFO L87 Difference]: Start difference. First operand 260 states and 269 transitions. Second operand 17 states. [2020-10-28 08:57:23,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:23,320 INFO L93 Difference]: Finished difference Result 493 states and 517 transitions. [2020-10-28 08:57:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:57:23,321 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 255 [2020-10-28 08:57:23,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:23,324 INFO L225 Difference]: With dead ends: 493 [2020-10-28 08:57:23,324 INFO L226 Difference]: Without dead ends: 284 [2020-10-28 08:57:23,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:57:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-28 08:57:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 276. [2020-10-28 08:57:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-28 08:57:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 285 transitions. [2020-10-28 08:57:23,337 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 285 transitions. Word has length 255 [2020-10-28 08:57:23,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:23,337 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 285 transitions. [2020-10-28 08:57:23,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:57:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 285 transitions. [2020-10-28 08:57:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-28 08:57:23,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:23,339 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 1, 1, 1, 1, 1, 1, 1, 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 08:57:23,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:57:23,340 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:23,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1446183618, now seen corresponding path program 20 times [2020-10-28 08:57:23,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:23,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772406477] [2020-10-28 08:57:23,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:23,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:23,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:23,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:23,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:23,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:28,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:28,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-28 08:57:28,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:28,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5418 [2020-10-28 08:57:28,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:28,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:28,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:57:28,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 08:57:28,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:57:28,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:29,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:29,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:29,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:29,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:29,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:29,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:57:29,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:29,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:29,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:29,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:29,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:29,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1632 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1436 trivial. 0 not checked. [2020-10-28 08:57:29,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772406477] [2020-10-28 08:57:29,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:29,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:57:29,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577513197] [2020-10-28 08:57:29,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:57:29,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:29,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:57:29,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:57:29,140 INFO L87 Difference]: Start difference. First operand 276 states and 285 transitions. Second operand 18 states. [2020-10-28 08:57:29,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:30,000 INFO L93 Difference]: Finished difference Result 523 states and 547 transitions. [2020-10-28 08:57:30,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:57:30,000 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 271 [2020-10-28 08:57:30,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:30,003 INFO L225 Difference]: With dead ends: 523 [2020-10-28 08:57:30,003 INFO L226 Difference]: Without dead ends: 300 [2020-10-28 08:57:30,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:57:30,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-28 08:57:30,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 292. [2020-10-28 08:57:30,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-28 08:57:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 301 transitions. [2020-10-28 08:57:30,016 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 301 transitions. Word has length 271 [2020-10-28 08:57:30,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:30,016 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 301 transitions. [2020-10-28 08:57:30,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:57:30,016 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 301 transitions. [2020-10-28 08:57:30,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-10-28 08:57:30,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:30,018 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 8, 8, 1, 1, 1, 1, 1, 1, 1, 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 08:57:30,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:57:30,019 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:30,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:30,019 INFO L82 PathProgramCache]: Analyzing trace with hash -755745490, now seen corresponding path program 21 times [2020-10-28 08:57:30,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:30,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229634785] [2020-10-28 08:57:30,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:30,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:30,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:30,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:30,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:30,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:35,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:35,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-28 08:57:35,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:35,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5112 [2020-10-28 08:57:35,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:35,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:35,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:57:35,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:35,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:57:35,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:35,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:35,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:35,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:35,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:35,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:35,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:35,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:35,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:35,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:35,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:35,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:35,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-28 08:57:35,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229634785] [2020-10-28 08:57:35,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:35,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:57:35,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71373098] [2020-10-28 08:57:35,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:57:35,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:35,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:57:35,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:57:35,371 INFO L87 Difference]: Start difference. First operand 292 states and 301 transitions. Second operand 12 states. [2020-10-28 08:57:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:35,542 INFO L93 Difference]: Finished difference Result 564 states and 582 transitions. [2020-10-28 08:57:35,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:57:35,543 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 287 [2020-10-28 08:57:35,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:35,545 INFO L225 Difference]: With dead ends: 564 [2020-10-28 08:57:35,545 INFO L226 Difference]: Without dead ends: 295 [2020-10-28 08:57:35,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:57:35,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-28 08:57:35,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2020-10-28 08:57:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-28 08:57:35,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 303 transitions. [2020-10-28 08:57:35,559 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 303 transitions. Word has length 287 [2020-10-28 08:57:35,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:35,559 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 303 transitions. [2020-10-28 08:57:35,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:57:35,559 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 303 transitions. [2020-10-28 08:57:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-28 08:57:35,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:35,561 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 9, 9, 1, 1, 1, 1, 1, 1, 1, 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 08:57:35,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:57:35,562 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:35,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:35,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1039499404, now seen corresponding path program 22 times [2020-10-28 08:57:35,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:35,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182074076] [2020-10-28 08:57:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:35,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:35,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:35,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:35,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:35,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:40,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:40,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-28 08:57:40,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:40,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 08:57:40,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:40,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:40,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:57:40,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-28 08:57:40,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:57:40,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:40,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:40,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:40,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:40,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:40,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:40,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:40,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:40,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:40,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:40,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:40,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:40,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1881 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2020-10-28 08:57:40,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182074076] [2020-10-28 08:57:40,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:40,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:57:40,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236405094] [2020-10-28 08:57:40,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:57:40,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:40,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:57:40,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:57:40,989 INFO L87 Difference]: Start difference. First operand 294 states and 303 transitions. Second operand 19 states. [2020-10-28 08:57:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:41,901 INFO L93 Difference]: Finished difference Result 555 states and 579 transitions. [2020-10-28 08:57:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:57:41,902 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 289 [2020-10-28 08:57:41,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:41,905 INFO L225 Difference]: With dead ends: 555 [2020-10-28 08:57:41,905 INFO L226 Difference]: Without dead ends: 318 [2020-10-28 08:57:41,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:57:41,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-28 08:57:41,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 310. [2020-10-28 08:57:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-28 08:57:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 319 transitions. [2020-10-28 08:57:41,919 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 319 transitions. Word has length 289 [2020-10-28 08:57:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:41,919 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 319 transitions. [2020-10-28 08:57:41,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:57:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 319 transitions. [2020-10-28 08:57:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-28 08:57:41,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:41,922 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 1, 1, 1, 1, 1, 1, 1, 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 08:57:41,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:57:41,922 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:41,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:41,923 INFO L82 PathProgramCache]: Analyzing trace with hash -486071172, now seen corresponding path program 23 times [2020-10-28 08:57:41,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:41,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975455923] [2020-10-28 08:57:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:42,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:42,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:42,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:42,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:42,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:47,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:47,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-28 08:57:47,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:47,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5376 [2020-10-28 08:57:47,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:47,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:47,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:57:47,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:47,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:57:47,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:47,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:47,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:47,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:47,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:47,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:47,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:57:47,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:47,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:47,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:47,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:47,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:47,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2129 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2020-10-28 08:57:47,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975455923] [2020-10-28 08:57:47,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:47,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:57:47,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5871931] [2020-10-28 08:57:47,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:57:47,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:47,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:57:47,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:57:47,570 INFO L87 Difference]: Start difference. First operand 310 states and 319 transitions. Second operand 13 states. [2020-10-28 08:57:47,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:47,764 INFO L93 Difference]: Finished difference Result 598 states and 616 transitions. [2020-10-28 08:57:47,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:57:47,765 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 305 [2020-10-28 08:57:47,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:47,766 INFO L225 Difference]: With dead ends: 598 [2020-10-28 08:57:47,766 INFO L226 Difference]: Without dead ends: 313 [2020-10-28 08:57:47,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:57:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-28 08:57:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 312. [2020-10-28 08:57:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-28 08:57:47,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 321 transitions. [2020-10-28 08:57:47,779 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 321 transitions. Word has length 305 [2020-10-28 08:57:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:47,779 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 321 transitions. [2020-10-28 08:57:47,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:57:47,780 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 321 transitions. [2020-10-28 08:57:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-28 08:57:47,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:47,782 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 1, 1, 1, 1, 1, 1, 1, 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 08:57:47,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:57:47,782 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:47,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:47,783 INFO L82 PathProgramCache]: Analyzing trace with hash 200117338, now seen corresponding path program 24 times [2020-10-28 08:57:47,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:47,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885292221] [2020-10-28 08:57:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:47,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:48,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:48,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:48,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:48,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:53,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:53,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-28 08:57:53,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:53,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5379 [2020-10-28 08:57:53,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:53,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:53,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:57:53,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 135 [2020-10-28 08:57:53,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:57:53,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:53,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:53,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:53,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:53,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:53,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:53,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:57:53,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:53,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:53,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:53,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:53,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:53,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2020-10-28 08:57:53,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885292221] [2020-10-28 08:57:53,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:53,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:57:53,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194031067] [2020-10-28 08:57:53,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:57:53,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:53,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:57:53,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:57:53,747 INFO L87 Difference]: Start difference. First operand 312 states and 321 transitions. Second operand 20 states. [2020-10-28 08:57:54,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:54,603 INFO L93 Difference]: Finished difference Result 587 states and 611 transitions. [2020-10-28 08:57:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:57:54,603 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 307 [2020-10-28 08:57:54,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:54,606 INFO L225 Difference]: With dead ends: 587 [2020-10-28 08:57:54,606 INFO L226 Difference]: Without dead ends: 336 [2020-10-28 08:57:54,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:57:54,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-28 08:57:54,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 328. [2020-10-28 08:57:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-28 08:57:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 337 transitions. [2020-10-28 08:57:54,619 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 337 transitions. Word has length 307 [2020-10-28 08:57:54,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:54,619 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 337 transitions. [2020-10-28 08:57:54,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:57:54,619 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 337 transitions. [2020-10-28 08:57:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-28 08:57:54,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:54,622 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 1, 1, 1, 1, 1, 1, 1, 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 08:57:54,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:57:54,622 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:54,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:54,623 INFO L82 PathProgramCache]: Analyzing trace with hash 151557194, now seen corresponding path program 25 times [2020-10-28 08:57:54,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:54,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035833764] [2020-10-28 08:57:54,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:54,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:54,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:54,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:54,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:55,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:00,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:00,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 08:58:00,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:00,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5398 [2020-10-28 08:58:00,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:00,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:00,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:58:00,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 08:58:00,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:58:00,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:00,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:00,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:00,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:00,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:00,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:00,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:00,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:00,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:00,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:00,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:00,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:00,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2412 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2123 trivial. 0 not checked. [2020-10-28 08:58:00,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035833764] [2020-10-28 08:58:00,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:00,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:58:00,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740956662] [2020-10-28 08:58:00,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:58:00,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:00,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:58:00,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:58:00,511 INFO L87 Difference]: Start difference. First operand 328 states and 337 transitions. Second operand 21 states. [2020-10-28 08:58:01,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:01,529 INFO L93 Difference]: Finished difference Result 617 states and 641 transitions. [2020-10-28 08:58:01,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:58:01,529 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 323 [2020-10-28 08:58:01,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:01,531 INFO L225 Difference]: With dead ends: 617 [2020-10-28 08:58:01,532 INFO L226 Difference]: Without dead ends: 352 [2020-10-28 08:58:01,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:58:01,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-28 08:58:01,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 344. [2020-10-28 08:58:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-28 08:58:01,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 353 transitions. [2020-10-28 08:58:01,546 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 353 transitions. Word has length 323 [2020-10-28 08:58:01,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:01,546 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 353 transitions. [2020-10-28 08:58:01,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:58:01,547 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 353 transitions. [2020-10-28 08:58:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-28 08:58:01,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:01,550 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 10, 10, 1, 1, 1, 1, 1, 1, 1, 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 08:58:01,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:58:01,550 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:01,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:01,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1836811206, now seen corresponding path program 26 times [2020-10-28 08:58:01,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:01,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981626809] [2020-10-28 08:58:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:01,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:01,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:02,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:02,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:02,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:13,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:13,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 349 [2020-10-28 08:58:13,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:13,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12338 [2020-10-28 08:58:13,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:13,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:13,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:58:13,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:13,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:58:13,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:14,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:14,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:14,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:14,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:14,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:14,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:58:14,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:14,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:14,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2692 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2020-10-28 08:58:14,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981626809] [2020-10-28 08:58:14,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:14,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:58:14,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876748663] [2020-10-28 08:58:14,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:58:14,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:14,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:58:14,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:58:14,272 INFO L87 Difference]: Start difference. First operand 344 states and 353 transitions. Second operand 14 states. [2020-10-28 08:58:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:14,492 INFO L93 Difference]: Finished difference Result 664 states and 682 transitions. [2020-10-28 08:58:14,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:58:14,493 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 339 [2020-10-28 08:58:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:14,495 INFO L225 Difference]: With dead ends: 664 [2020-10-28 08:58:14,495 INFO L226 Difference]: Without dead ends: 347 [2020-10-28 08:58:14,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:58:14,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-28 08:58:14,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 346. [2020-10-28 08:58:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-10-28 08:58:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 355 transitions. [2020-10-28 08:58:14,507 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 355 transitions. Word has length 339 [2020-10-28 08:58:14,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:14,507 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 355 transitions. [2020-10-28 08:58:14,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:58:14,508 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 355 transitions. [2020-10-28 08:58:14,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-28 08:58:14,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:14,510 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 11, 11, 1, 1, 1, 1, 1, 1, 1, 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 08:58:14,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:58:14,510 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:14,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1728539800, now seen corresponding path program 27 times [2020-10-28 08:58:14,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:14,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316377521] [2020-10-28 08:58:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:14,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:14,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:14,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:14,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:15,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:19,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:19,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 351 [2020-10-28 08:58:19,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:19,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-28 08:58:19,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:19,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:58:19,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 08:58:19,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 08:58:19,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:20,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:20,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:20,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:20,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:20,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:20,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:20,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:20,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:20,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:20,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:20,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:20,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2713 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2389 trivial. 0 not checked. [2020-10-28 08:58:20,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316377521] [2020-10-28 08:58:20,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:20,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:58:20,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809991171] [2020-10-28 08:58:20,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:58:20,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:20,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:58:20,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:58:20,144 INFO L87 Difference]: Start difference. First operand 346 states and 355 transitions. Second operand 22 states. [2020-10-28 08:58:21,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:21,107 INFO L93 Difference]: Finished difference Result 649 states and 673 transitions. [2020-10-28 08:58:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:58:21,108 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 341 [2020-10-28 08:58:21,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:21,111 INFO L225 Difference]: With dead ends: 649 [2020-10-28 08:58:21,111 INFO L226 Difference]: Without dead ends: 370 [2020-10-28 08:58:21,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:58:21,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-28 08:58:21,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 362. [2020-10-28 08:58:21,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-10-28 08:58:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 371 transitions. [2020-10-28 08:58:21,123 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 371 transitions. Word has length 341 [2020-10-28 08:58:21,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:21,124 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 371 transitions. [2020-10-28 08:58:21,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:58:21,124 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 371 transitions. [2020-10-28 08:58:21,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-10-28 08:58:21,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:21,126 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 11, 11, 1, 1, 1, 1, 1, 1, 1, 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 08:58:21,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:58:21,127 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:21,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:21,127 INFO L82 PathProgramCache]: Analyzing trace with hash -924600184, now seen corresponding path program 28 times [2020-10-28 08:58:21,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:21,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360546199] [2020-10-28 08:58:21,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:21,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:21,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:21,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:21,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:21,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:26,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:26,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 367 [2020-10-28 08:58:26,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:26,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5557 [2020-10-28 08:58:26,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:26,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:26,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:58:26,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:26,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:58:26,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:26,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:26,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:26,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:26,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:26,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:26,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:58:26,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:26,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:26,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:26,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:26,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:26,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2020-10-28 08:58:27,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360546199] [2020-10-28 08:58:27,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:27,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:58:27,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164284403] [2020-10-28 08:58:27,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:58:27,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:27,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:58:27,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:58:27,111 INFO L87 Difference]: Start difference. First operand 362 states and 371 transitions. Second operand 15 states. [2020-10-28 08:58:27,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:27,404 INFO L93 Difference]: Finished difference Result 698 states and 716 transitions. [2020-10-28 08:58:27,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:58:27,405 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 357 [2020-10-28 08:58:27,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:27,410 INFO L225 Difference]: With dead ends: 698 [2020-10-28 08:58:27,411 INFO L226 Difference]: Without dead ends: 365 [2020-10-28 08:58:27,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:58:27,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-28 08:58:27,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 364. [2020-10-28 08:58:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-28 08:58:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 373 transitions. [2020-10-28 08:58:27,434 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 373 transitions. Word has length 357 [2020-10-28 08:58:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:27,435 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 373 transitions. [2020-10-28 08:58:27,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:58:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 373 transitions. [2020-10-28 08:58:27,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-10-28 08:58:27,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:27,439 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 12, 1, 1, 1, 1, 1, 1, 1, 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 08:58:27,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:58:27,440 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:27,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:27,440 INFO L82 PathProgramCache]: Analyzing trace with hash -2128966298, now seen corresponding path program 29 times [2020-10-28 08:58:27,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:27,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313296992] [2020-10-28 08:58:27,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:27,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:27,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:27,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:27,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:28,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:33,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:33,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 369 [2020-10-28 08:58:33,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:33,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5667 [2020-10-28 08:58:33,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:33,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:33,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 08:58:33,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:58:33,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:58:33,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:33,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:33,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:33,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:33,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:33,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:33,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:58:33,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:33,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:33,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:33,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:33,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:33,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3032 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2671 trivial. 0 not checked. [2020-10-28 08:58:33,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313296992] [2020-10-28 08:58:33,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:33,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:58:33,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688680040] [2020-10-28 08:58:33,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:58:33,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:33,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:58:33,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:58:33,764 INFO L87 Difference]: Start difference. First operand 364 states and 373 transitions. Second operand 23 states. [2020-10-28 08:58:34,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:34,823 INFO L93 Difference]: Finished difference Result 681 states and 705 transitions. [2020-10-28 08:58:34,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:58:34,824 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 359 [2020-10-28 08:58:34,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:34,827 INFO L225 Difference]: With dead ends: 681 [2020-10-28 08:58:34,827 INFO L226 Difference]: Without dead ends: 388 [2020-10-28 08:58:34,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:58:34,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-28 08:58:34,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 380. [2020-10-28 08:58:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2020-10-28 08:58:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 389 transitions. [2020-10-28 08:58:34,840 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 389 transitions. Word has length 359 [2020-10-28 08:58:34,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:34,841 INFO L481 AbstractCegarLoop]: Abstraction has 380 states and 389 transitions. [2020-10-28 08:58:34,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:58:34,841 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 389 transitions. [2020-10-28 08:58:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-10-28 08:58:34,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:34,844 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 12, 12, 1, 1, 1, 1, 1, 1, 1, 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 08:58:34,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:58:34,844 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:34,844 INFO L82 PathProgramCache]: Analyzing trace with hash 32914774, now seen corresponding path program 30 times [2020-10-28 08:58:34,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:34,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983379918] [2020-10-28 08:58:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:35,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:35,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:35,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:35,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:35,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:40,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:40,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-28 08:58:40,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:40,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5968 [2020-10-28 08:58:40,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:40,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:40,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:58:40,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-28 08:58:40,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:58:40,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:41,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:41,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:41,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:41,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:41,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:41,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:58:41,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:41,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:41,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3344 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2944 trivial. 0 not checked. [2020-10-28 08:58:41,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983379918] [2020-10-28 08:58:41,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:41,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:58:41,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040675092] [2020-10-28 08:58:41,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:58:41,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:41,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:58:41,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:58:41,452 INFO L87 Difference]: Start difference. First operand 380 states and 389 transitions. Second operand 24 states. [2020-10-28 08:58:42,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:42,712 INFO L93 Difference]: Finished difference Result 711 states and 735 transitions. [2020-10-28 08:58:42,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:58:42,713 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 375 [2020-10-28 08:58:42,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:42,716 INFO L225 Difference]: With dead ends: 711 [2020-10-28 08:58:42,716 INFO L226 Difference]: Without dead ends: 404 [2020-10-28 08:58:42,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:58:42,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-28 08:58:42,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 396. [2020-10-28 08:58:42,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-10-28 08:58:42,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 405 transitions. [2020-10-28 08:58:42,730 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 405 transitions. Word has length 375 [2020-10-28 08:58:42,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:42,730 INFO L481 AbstractCegarLoop]: Abstraction has 396 states and 405 transitions. [2020-10-28 08:58:42,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:58:42,730 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 405 transitions. [2020-10-28 08:58:42,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-28 08:58:42,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:42,733 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 12, 12, 1, 1, 1, 1, 1, 1, 1, 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 08:58:42,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:58:42,734 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:42,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:42,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2103259834, now seen corresponding path program 31 times [2020-10-28 08:58:42,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:42,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685812512] [2020-10-28 08:58:42,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:42,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:42,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:43,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:43,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:43,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:48,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:48,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 401 [2020-10-28 08:58:48,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:48,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5711 [2020-10-28 08:58:48,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:48,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:48,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:58:48,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:48,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:58:48,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:48,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:48,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:48,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:48,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:48,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:48,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:48,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:48,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:48,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:48,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:48,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:48,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3672 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2020-10-28 08:58:48,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685812512] [2020-10-28 08:58:48,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:48,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:58:48,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868594183] [2020-10-28 08:58:48,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:58:48,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:48,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:58:48,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:58:48,898 INFO L87 Difference]: Start difference. First operand 396 states and 405 transitions. Second operand 16 states. [2020-10-28 08:58:49,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:49,096 INFO L93 Difference]: Finished difference Result 764 states and 782 transitions. [2020-10-28 08:58:49,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:58:49,097 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 391 [2020-10-28 08:58:49,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:49,099 INFO L225 Difference]: With dead ends: 764 [2020-10-28 08:58:49,099 INFO L226 Difference]: Without dead ends: 399 [2020-10-28 08:58:49,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:58:49,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-10-28 08:58:49,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 398. [2020-10-28 08:58:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2020-10-28 08:58:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 407 transitions. [2020-10-28 08:58:49,113 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 407 transitions. Word has length 391 [2020-10-28 08:58:49,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:49,113 INFO L481 AbstractCegarLoop]: Abstraction has 398 states and 407 transitions. [2020-10-28 08:58:49,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:58:49,113 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 407 transitions. [2020-10-28 08:58:49,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-10-28 08:58:49,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:49,117 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 13, 13, 1, 1, 1, 1, 1, 1, 1, 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 08:58:49,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:58:49,117 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:49,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:49,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1545267876, now seen corresponding path program 32 times [2020-10-28 08:58:49,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:49,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706622610] [2020-10-28 08:58:49,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:49,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:49,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:49,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking...