/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=DEEPEST --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/loops-crafted-1/mono-crafted_10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:27:24,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:27:24,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:27:24,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:27:24,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:27:24,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:27:24,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:27:24,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:27:24,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:27:24,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:27:24,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:27:24,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:27:24,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:27:24,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:27:24,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:27:24,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:27:24,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:27:24,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:27:24,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:27:24,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:27:24,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:27:24,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:27:24,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:27:24,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:27:24,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:27:24,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:27:24,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:27:24,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:27:24,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:27:24,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:27:24,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:27:24,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:27:24,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:27:24,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:27:24,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:27:24,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:27:24,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:27:24,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:27:24,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:27:24,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:27:24,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:27:24,861 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 [2020-10-27 20:27:24,893 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:27:24,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:27:24,895 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:27:24,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:27:24,895 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:27:24,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:27:24,896 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:27:24,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:27:24,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:27:24,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:27:24,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:27:24,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:27:24,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:27:24,897 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:27:24,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:27:24,898 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:27:24,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:27:24,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:27:24,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:27:24,899 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:27:24,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:27:24,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:27:24,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:27:24,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:27:24,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:27:24,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:27:24,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:27:24,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:27:24,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:27:24,901 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:27:25,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:27:25,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:27:25,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:27:25,342 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:27:25,343 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:27:25,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_10.c [2020-10-27 20:27:25,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/445ffb5c0/509a7db0909245929f544fa4629dc5bf/FLAG5a0d6e198 [2020-10-27 20:27:25,994 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:27:25,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_10.c [2020-10-27 20:27:26,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/445ffb5c0/509a7db0909245929f544fa4629dc5bf/FLAG5a0d6e198 [2020-10-27 20:27:26,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/445ffb5c0/509a7db0909245929f544fa4629dc5bf [2020-10-27 20:27:26,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:27:26,361 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:27:26,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:27:26,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:27:26,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:27:26,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:27:26" (1/1) ... [2020-10-27 20:27:26,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db2333e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:26, skipping insertion in model container [2020-10-27 20:27:26,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:27:26" (1/1) ... [2020-10-27 20:27:26,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:27:26,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:27:26,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:27:26,564 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:27:26,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:27:26,597 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:27:26,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:26 WrapperNode [2020-10-27 20:27:26,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:27:26,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:27:26,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:27:26,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:27:26,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:26" (1/1) ... [2020-10-27 20:27:26,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:26" (1/1) ... [2020-10-27 20:27:26,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:26" (1/1) ... [2020-10-27 20:27:26,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:26" (1/1) ... [2020-10-27 20:27:26,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:26" (1/1) ... [2020-10-27 20:27:26,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:26" (1/1) ... [2020-10-27 20:27:26,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:26" (1/1) ... [2020-10-27 20:27:26,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:27:26,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:27:26,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:27:26,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:27:26,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:26" (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 [2020-10-27 20:27:26,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:27:26,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:27:26,777 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:27:26,778 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:27:26,778 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:27:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:27:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:27:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:27:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:27:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:27:26,780 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:27:26,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:27:26,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:27:26,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:27:26,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:27:26,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:27:26,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:27:27,059 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:27:27,059 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:27:27,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:27:27 BoogieIcfgContainer [2020-10-27 20:27:27,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:27:27,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:27:27,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:27:27,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:27:27,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:27:26" (1/3) ... [2020-10-27 20:27:27,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e55498e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:27:27, skipping insertion in model container [2020-10-27 20:27:27,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:26" (2/3) ... [2020-10-27 20:27:27,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e55498e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:27:27, skipping insertion in model container [2020-10-27 20:27:27,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:27:27" (3/3) ... [2020-10-27 20:27:27,081 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_10.c [2020-10-27 20:27:27,093 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:27:27,099 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:27:27,113 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:27:27,154 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:27:27,154 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:27:27,154 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:27:27,154 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:27:27,154 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:27:27,154 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:27:27,154 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:27:27,155 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:27:27,171 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 20:27:27,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:27:27,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:27,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:27,178 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:27,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1507135652, now seen corresponding path program 1 times [2020-10-27 20:27:27,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:27,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970438326] [2020-10-27 20:27:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:27,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:27,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:27,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:27:27,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:27,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-27 20:27:27,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:27,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:27,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:27:27,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:27,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:27:27,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:27,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:27,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:27,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:27,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:27,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 20:27:27,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:27,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:27,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:27,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:27,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:27,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970438326] [2020-10-27 20:27:27,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:27:27,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:27:27,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146116844] [2020-10-27 20:27:27,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:27:27,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:27,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:27:27,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:27:27,605 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-27 20:27:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:27,683 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-27 20:27:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:27:27,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 20:27:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:27,692 INFO L225 Difference]: With dead ends: 38 [2020-10-27 20:27:27,692 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 20:27:27,696 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 [2020-10-27 20:27:27,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 20:27:27,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 20:27:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:27:27,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-27 20:27:27,739 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-27 20:27:27,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:27,739 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-27 20:27:27,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:27:27,739 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-27 20:27:27,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:27:27,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:27,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:27,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:27:27,741 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:27,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:27,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1192214991, now seen corresponding path program 1 times [2020-10-27 20:27:27,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:27,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069282022] [2020-10-27 20:27:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:27,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:27,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:27,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:27:27,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:27,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-27 20:27:27,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:27,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:27:27,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:27,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:27:27,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:28,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:28,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:28,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:28,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:28,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:28,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 20:27:28,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:28,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:28,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:28,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:28,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:28,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069282022] [2020-10-27 20:27:28,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:27:28,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:27:28,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173608284] [2020-10-27 20:27:28,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:27:28,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:28,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:27:28,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:27:28,198 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-27 20:27:28,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:28,368 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-27 20:27:28,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:27:28,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 20:27:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:28,371 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:27:28,371 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:27:28,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:27:28,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:27:28,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-27 20:27:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:27:28,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-27 20:27:28,391 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-27 20:27:28,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:28,391 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-27 20:27:28,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:27:28,392 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-27 20:27:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:27:28,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:28,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:28,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:27:28,394 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:28,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:28,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1953512822, now seen corresponding path program 1 times [2020-10-27 20:27:28,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:28,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304845621] [2020-10-27 20:27:28,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:28,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:28,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:28,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:28,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:27:28,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:27:28,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-27 20:27:28,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:28,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:27:28,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:28,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:27:28,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:27:28,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:28,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:28,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:28,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:28,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:28,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:27:28,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:28,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:28,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304845621] [2020-10-27 20:27:28,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:27:28,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:27:28,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768705541] [2020-10-27 20:27:28,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:27:28,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:27:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:27:28,780 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-27 20:27:28,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:28,854 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-27 20:27:28,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:27:28,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 20:27:28,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:28,855 INFO L225 Difference]: With dead ends: 27 [2020-10-27 20:27:28,856 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:27:28,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:27:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:27:28,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-27 20:27:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:27:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-27 20:27:28,863 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2020-10-27 20:27:28,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:28,863 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-27 20:27:28,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:27:28,864 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-27 20:27:28,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:27:28,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:28,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:28,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:27:28,865 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:28,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:28,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1532107848, now seen corresponding path program 1 times [2020-10-27 20:27:28,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:28,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246542910] [2020-10-27 20:27:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:28,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:28,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:28,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:27:28,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:28,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-27 20:27:28,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:28,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:27:28,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:28,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:27:28,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:29,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:29,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:29,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:29,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:29,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:29,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:27:29,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:29,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:29,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:29,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:29,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:29,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246542910] [2020-10-27 20:27:29,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:29,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:27:29,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810681636] [2020-10-27 20:27:29,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:27:29,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:29,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:27:29,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:27:29,073 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-27 20:27:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:29,229 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-27 20:27:29,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:27:29,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-27 20:27:29,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:29,231 INFO L225 Difference]: With dead ends: 27 [2020-10-27 20:27:29,231 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:27:29,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:27:29,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:27:29,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-27 20:27:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 20:27:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-27 20:27:29,238 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-10-27 20:27:29,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:29,238 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-27 20:27:29,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:27:29,239 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-27 20:27:29,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:27:29,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:29,240 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:29,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:27:29,240 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:29,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:29,241 INFO L82 PathProgramCache]: Analyzing trace with hash 556673393, now seen corresponding path program 1 times [2020-10-27 20:27:29,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:29,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667158458] [2020-10-27 20:27:29,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:29,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:29,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:29,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:29,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:27:29,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:27:29,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-27 20:27:29,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:29,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:27:29,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:29,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:27:29,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:29,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:29,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:29,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:29,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:29,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:29,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:27:29,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:29,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:29,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:29,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:29,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:29,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667158458] [2020-10-27 20:27:29,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:29,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:27:29,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743109745] [2020-10-27 20:27:29,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:27:29,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:29,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:27:29,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:27:29,502 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-10-27 20:27:29,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:29,619 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-27 20:27:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:27:29,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-27 20:27:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:29,620 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:27:29,620 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:27:29,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:27:29,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:27:29,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-27 20:27:29,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:27:29,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-27 20:27:29,628 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-10-27 20:27:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:29,628 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-27 20:27:29,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:27:29,628 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-27 20:27:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:27:29,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:29,629 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:29,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:27:29,630 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:29,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:29,631 INFO L82 PathProgramCache]: Analyzing trace with hash -252673233, now seen corresponding path program 2 times [2020-10-27 20:27:29,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:29,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222882547] [2020-10-27 20:27:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:29,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:29,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:29,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:29,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:27:29,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:27:29,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-27 20:27:29,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:29,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:27:29,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:29,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:27:29,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:29,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:29,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:29,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:29,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:29,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:29,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:27:29,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:29,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:29,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:29,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:29,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:29,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222882547] [2020-10-27 20:27:29,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:29,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:27:29,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382937373] [2020-10-27 20:27:29,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:27:29,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:29,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:27:29,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:27:29,975 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-27 20:27:30,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:30,177 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-27 20:27:30,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:27:30,179 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 20:27:30,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:30,180 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:27:30,180 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 20:27:30,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:27:30,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 20:27:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-27 20:27:30,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:27:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-27 20:27:30,195 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-10-27 20:27:30,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:30,195 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-27 20:27:30,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:27:30,196 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-27 20:27:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:27:30,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:30,199 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:30,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:27:30,200 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:30,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:30,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1838613802, now seen corresponding path program 2 times [2020-10-27 20:27:30,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:30,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424633041] [2020-10-27 20:27:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:30,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:30,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:30,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:30,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:30,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:30,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:27:30,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:27:30,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-27 20:27:30,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:30,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:27:30,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:30,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:27:30,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:31,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:31,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:31,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:31,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:31,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:31,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:27:31,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:31,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:31,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:31,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:31,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:27:31,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424633041] [2020-10-27 20:27:31,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:31,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:27:31,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899199934] [2020-10-27 20:27:31,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:27:31,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:31,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:27:31,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:27:31,201 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 10 states. [2020-10-27 20:27:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:33,971 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-27 20:27:33,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:27:33,973 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-27 20:27:33,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:33,975 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:27:33,975 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 20:27:33,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:27:33,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 20:27:33,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-27 20:27:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 20:27:33,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-27 20:27:33,991 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-10-27 20:27:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:33,991 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-27 20:27:33,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:27:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-27 20:27:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:27:33,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:33,993 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:33,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:27:33,994 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:33,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:33,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1029267176, now seen corresponding path program 3 times [2020-10-27 20:27:33,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:33,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031640355] [2020-10-27 20:27:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:34,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:34,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:34,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:34,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:34,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:27:34,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:34,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-27 20:27:34,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:34,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:27:34,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:34,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:27:34,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:34,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:34,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:34,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:34,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:34,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:34,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:27:34,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:34,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:34,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031640355] [2020-10-27 20:27:34,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:34,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:27:34,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45623801] [2020-10-27 20:27:34,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:27:34,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:34,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:27:34,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:27:34,468 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-10-27 20:27:34,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:34,773 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-27 20:27:34,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:27:34,774 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 20:27:34,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:34,775 INFO L225 Difference]: With dead ends: 43 [2020-10-27 20:27:34,775 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 20:27:34,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:27:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 20:27:34,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-10-27 20:27:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 20:27:34,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-27 20:27:34,784 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2020-10-27 20:27:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:34,784 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-27 20:27:34,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:27:34,785 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-27 20:27:34,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:27:34,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:34,785 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:34,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:27:34,786 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:34,786 INFO L82 PathProgramCache]: Analyzing trace with hash 575077711, now seen corresponding path program 3 times [2020-10-27 20:27:34,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:34,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173937972] [2020-10-27 20:27:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:34,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:34,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:34,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:35,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:35,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:35,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:35,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:27:35,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:27:35,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 984 [2020-10-27 20:27:35,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:35,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:27:35,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:35,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:27:35,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:36,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:36,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:36,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:36,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:36,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:36,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:27:36,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:36,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:36,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:36,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:36,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:27:36,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173937972] [2020-10-27 20:27:36,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:36,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:27:36,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205975709] [2020-10-27 20:27:36,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:27:36,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:36,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:27:36,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:27:36,311 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 12 states. [2020-10-27 20:27:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:39,306 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-10-27 20:27:39,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:27:39,307 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-27 20:27:39,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:39,308 INFO L225 Difference]: With dead ends: 48 [2020-10-27 20:27:39,308 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 20:27:39,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=73, Invalid=346, Unknown=1, NotChecked=0, Total=420 [2020-10-27 20:27:39,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 20:27:39,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-27 20:27:39,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:27:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-27 20:27:39,318 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-10-27 20:27:39,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:39,318 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-27 20:27:39,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:27:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-27 20:27:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:27:39,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:39,319 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:39,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:27:39,319 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:39,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:39,320 INFO L82 PathProgramCache]: Analyzing trace with hash 466795663, now seen corresponding path program 4 times [2020-10-27 20:27:39,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:39,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334699303] [2020-10-27 20:27:39,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:39,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:39,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:39,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:39,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:39,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:39,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:27:39,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:27:39,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-27 20:27:39,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:39,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:27:39,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:39,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:27:39,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:40,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:40,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:40,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:40,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:40,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:40,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:40,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:40,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:40,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:40,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:40,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 20:27:40,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334699303] [2020-10-27 20:27:40,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:40,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:27:40,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926651191] [2020-10-27 20:27:40,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:27:40,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:40,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:27:40,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:27:40,061 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2020-10-27 20:27:40,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:40,259 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-27 20:27:40,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:27:40,259 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-27 20:27:40,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:40,260 INFO L225 Difference]: With dead ends: 43 [2020-10-27 20:27:40,260 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 20:27:40,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:27:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 20:27:40,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2020-10-27 20:27:40,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 20:27:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-27 20:27:40,273 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2020-10-27 20:27:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:40,273 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-27 20:27:40,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:27:40,273 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-27 20:27:40,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:27:40,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:40,274 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:40,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:27:40,275 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:40,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:40,275 INFO L82 PathProgramCache]: Analyzing trace with hash -335227126, now seen corresponding path program 4 times [2020-10-27 20:27:40,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:40,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975693982] [2020-10-27 20:27:40,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:40,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:40,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:40,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:40,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:40,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:40,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:41,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:41,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:27:41,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:27:41,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1035 [2020-10-27 20:27:41,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:41,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:27:41,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:41,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:27:41,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:41,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:41,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:41,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:41,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:41,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:41,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:41,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:41,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:41,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:41,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:41,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:41,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975693982] [2020-10-27 20:27:41,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:41,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:27:41,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264002098] [2020-10-27 20:27:41,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:27:41,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:41,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:27:41,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:27:41,469 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-27 20:27:41,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:41,789 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-27 20:27:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:27:41,790 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-27 20:27:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:41,791 INFO L225 Difference]: With dead ends: 52 [2020-10-27 20:27:41,793 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:27:41,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:27:41,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:27:41,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-27 20:27:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:27:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-27 20:27:41,811 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 27 [2020-10-27 20:27:41,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:41,811 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-27 20:27:41,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:27:41,811 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-27 20:27:41,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:27:41,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:41,816 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:41,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:27:41,818 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:41,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:41,819 INFO L82 PathProgramCache]: Analyzing trace with hash -152288047, now seen corresponding path program 5 times [2020-10-27 20:27:41,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:41,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150191930] [2020-10-27 20:27:41,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:41,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:41,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:41,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:41,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:42,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:42,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:43,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:43,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:43,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:46,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:46,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:27:46,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:27:46,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:27:46,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:46,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:27:46,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:46,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:27:46,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:27:47,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:47,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:47,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:47,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:47,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:47,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:47,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:47,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:47,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:47,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:47,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:27:47,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150191930] [2020-10-27 20:27:47,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:47,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:27:47,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907784013] [2020-10-27 20:27:47,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:27:47,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:47,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:27:47,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:27:47,022 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 10 states. [2020-10-27 20:27:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:47,535 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-27 20:27:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:27:47,536 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-27 20:27:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:47,536 INFO L225 Difference]: With dead ends: 58 [2020-10-27 20:27:47,536 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:27:47,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:27:47,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:27:47,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-27 20:27:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:27:47,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-27 20:27:47,555 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2020-10-27 20:27:47,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:47,557 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-27 20:27:47,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:27:47,557 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-27 20:27:47,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:27:47,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:47,559 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:47,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:27:47,560 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:47,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:47,563 INFO L82 PathProgramCache]: Analyzing trace with hash -50928079, now seen corresponding path program 6 times [2020-10-27 20:27:47,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:47,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161063397] [2020-10-27 20:27:47,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:47,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:47,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:47,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:47,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:47,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:47,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:52,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:52,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:27:52,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 20:27:52,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 20:27:52,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:52,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:27:52,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:52,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:27:52,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:52,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:52,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:52,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:52,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:52,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:52,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:52,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:52,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:52,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:52,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:52,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:52,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161063397] [2020-10-27 20:27:52,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:52,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:27:52,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509268422] [2020-10-27 20:27:52,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:27:52,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:52,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:27:52,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:27:52,853 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 13 states. [2020-10-27 20:27:53,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:53,624 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-10-27 20:27:53,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:27:53,624 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-27 20:27:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:53,626 INFO L225 Difference]: With dead ends: 67 [2020-10-27 20:27:53,626 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 20:27:53,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:27:53,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 20:27:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-27 20:27:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 20:27:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-27 20:27:53,638 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 42 [2020-10-27 20:27:53,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:53,638 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-27 20:27:53,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:27:53,639 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-27 20:27:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:27:53,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:53,639 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:53,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:27:53,640 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:53,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:53,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1527468426, now seen corresponding path program 7 times [2020-10-27 20:27:53,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:53,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818012403] [2020-10-27 20:27:53,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:53,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:53,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:53,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:53,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:54,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:54,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:54,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:54,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:54,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:54,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:54,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:55,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:55,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:58,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:58,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:27:58,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 20:27:58,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:27:58,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:58,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:27:58,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:58,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:27:58,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:05,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:05,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:05,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:05,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:05,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:05,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:05,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:05,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:05,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:05,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:05,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-27 20:28:05,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818012403] [2020-10-27 20:28:05,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:05,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:28:05,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194976935] [2020-10-27 20:28:05,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:28:05,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:05,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:28:05,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=103, Unknown=3, NotChecked=0, Total=132 [2020-10-27 20:28:05,270 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 12 states. [2020-10-27 20:28:05,951 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-27 20:28:06,121 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-27 20:28:06,371 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-27 20:28:06,659 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-27 20:28:09,071 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-27 20:28:09,496 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2020-10-27 20:28:10,225 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 58 [2020-10-27 20:28:11,204 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 62 [2020-10-27 20:28:11,624 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2020-10-27 20:28:11,965 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2020-10-27 20:28:12,790 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-27 20:28:13,245 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-27 20:28:13,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:13,909 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2020-10-27 20:28:13,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:28:13,910 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-27 20:28:13,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:13,912 INFO L225 Difference]: With dead ends: 96 [2020-10-27 20:28:13,912 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 20:28:13,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=303, Invalid=686, Unknown=3, NotChecked=0, Total=992 [2020-10-27 20:28:13,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 20:28:13,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-27 20:28:13,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 20:28:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-10-27 20:28:13,931 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 51 [2020-10-27 20:28:13,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:13,932 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-10-27 20:28:13,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:28:13,932 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-10-27 20:28:13,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 20:28:13,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:13,933 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:13,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:28:13,933 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:13,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:13,934 INFO L82 PathProgramCache]: Analyzing trace with hash 453672266, now seen corresponding path program 8 times [2020-10-27 20:28:13,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:13,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169756053] [2020-10-27 20:28:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:13,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:14,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:14,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:14,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:14,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:14,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:14,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:14,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:14,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:15,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:18,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:18,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:18,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:18,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:18,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:18,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:18,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 20:28:18,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 20:28:18,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:28:18,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:18,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:28:18,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:28:18,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 20:28:18,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:20,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:20,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:20,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:20,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:20,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:20,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:20,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:20,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:20,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:20,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:20,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 20:28:20,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169756053] [2020-10-27 20:28:20,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:20,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:28:20,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463727911] [2020-10-27 20:28:20,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:28:20,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:20,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:28:20,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:28:20,041 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 19 states. [2020-10-27 20:28:30,481 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-27 20:28:30,819 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-27 20:28:31,391 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-27 20:28:32,377 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-27 20:28:37,067 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-27 20:28:38,430 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-27 20:28:43,541 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2020-10-27 20:28:52,873 WARN L193 SmtUtils]: Spent 7.19 s on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2020-10-27 20:29:06,761 WARN L193 SmtUtils]: Spent 4.65 s on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2020-10-27 20:29:08,834 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2020-10-27 20:29:10,639 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 25 [2020-10-27 20:29:14,364 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 101 DAG size of output: 53 [2020-10-27 20:29:19,449 WARN L193 SmtUtils]: Spent 3.13 s on a formula simplification. DAG size of input: 103 DAG size of output: 55 [2020-10-27 20:29:28,341 WARN L193 SmtUtils]: Spent 5.78 s on a formula simplification. DAG size of input: 109 DAG size of output: 53 [2020-10-27 20:29:45,758 WARN L193 SmtUtils]: Spent 11.94 s on a formula simplification. DAG size of input: 111 DAG size of output: 63 [2020-10-27 20:30:01,054 WARN L193 SmtUtils]: Spent 5.76 s on a formula simplification. DAG size of input: 117 DAG size of output: 53 [2020-10-27 20:30:10,072 WARN L193 SmtUtils]: Spent 3.90 s on a formula simplification. DAG size of input: 119 DAG size of output: 55 [2020-10-27 20:30:21,712 WARN L193 SmtUtils]: Spent 11.15 s on a formula simplification. DAG size of input: 143 DAG size of output: 55 [2020-10-27 20:30:23,821 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296))))) is different from false [2020-10-27 20:30:29,740 WARN L193 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 135 DAG size of output: 55 [2020-10-27 20:30:37,649 WARN L193 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 97 DAG size of output: 25 [2020-10-27 20:30:48,233 WARN L193 SmtUtils]: Spent 5.91 s on a formula simplification. DAG size of input: 127 DAG size of output: 55 [2020-10-27 20:30:58,851 WARN L193 SmtUtils]: Spent 7.54 s on a formula simplification. DAG size of input: 133 DAG size of output: 53 [2020-10-27 20:31:10,760 WARN L193 SmtUtils]: Spent 5.84 s on a formula simplification. DAG size of input: 127 DAG size of output: 55 [2020-10-27 20:31:16,691 WARN L193 SmtUtils]: Spent 4.77 s on a formula simplification. DAG size of input: 135 DAG size of output: 55 [2020-10-27 20:31:19,413 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (+ c_main_~x~0 4999990) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)))) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296)))) (<= (+ c_main_~x~0 4999989) (+ (* 4294967296 (div (+ c_main_~x~0 (- 12)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999988) (+ (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)) c_main_~y~0)) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2020-10-27 20:31:41,622 WARN L193 SmtUtils]: Spent 18.86 s on a formula simplification. DAG size of input: 141 DAG size of output: 53 [2020-10-27 20:31:44,211 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999990) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)))) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ c_main_~x~0 4999988) (+ (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ c_main_~x~0 4999989) (+ (* 4294967296 (div (+ c_main_~x~0 (- 12)) 4294967296)) c_main_~y~0))) is different from false