/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono5_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:48:43,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:48:43,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:48:43,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:48:43,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:48:43,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:48:43,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:48:43,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:48:43,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:48:43,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:48:43,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:48:43,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:48:43,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:48:43,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:48:43,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:48:43,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:48:43,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:48:43,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:48:43,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:48:43,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:48:43,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:48:43,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:48:43,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:48:43,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:48:43,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:48:43,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:48:43,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:48:43,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:48:43,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:48:43,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:48:43,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:48:43,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:48:43,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:48:43,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:48:43,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:48:43,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:48:43,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:48:43,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:48:43,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:48:43,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:48:43,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:48:43,800 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 01:48:43,828 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:48:43,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:48:43,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:48:43,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:48:43,830 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:48:43,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:48:43,831 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:48:43,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:48:43,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:48:43,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:48:43,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:48:43,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:48:43,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:48:43,833 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:48:43,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:48:43,833 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:48:43,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:48:43,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:48:43,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:48:43,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:48:43,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:48:43,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:48:43,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:48:43,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:48:43,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:48:43,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:48:43,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:48:43,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:48:43,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:48:43,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:48:44,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:48:44,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:48:44,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:48:44,242 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:48:44,242 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:48:44,243 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2020-10-27 01:48:44,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5374bf31f/b84f3df2e964443c833d652cde1294bf/FLAG51b5355a7 [2020-10-27 01:48:44,971 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:48:44,972 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2020-10-27 01:48:44,979 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5374bf31f/b84f3df2e964443c833d652cde1294bf/FLAG51b5355a7 [2020-10-27 01:48:45,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5374bf31f/b84f3df2e964443c833d652cde1294bf [2020-10-27 01:48:45,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:48:45,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:48:45,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:48:45,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:48:45,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:48:45,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:48:45" (1/1) ... [2020-10-27 01:48:45,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6177d2b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:45, skipping insertion in model container [2020-10-27 01:48:45,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:48:45" (1/1) ... [2020-10-27 01:48:45,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:48:45,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:48:45,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:48:45,624 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:48:45,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:48:45,658 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:48:45,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:45 WrapperNode [2020-10-27 01:48:45,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:48:45,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:48:45,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:48:45,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:48:45,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:45" (1/1) ... [2020-10-27 01:48:45,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:45" (1/1) ... [2020-10-27 01:48:45,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:45" (1/1) ... [2020-10-27 01:48:45,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:45" (1/1) ... [2020-10-27 01:48:45,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:45" (1/1) ... [2020-10-27 01:48:45,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:45" (1/1) ... [2020-10-27 01:48:45,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:45" (1/1) ... [2020-10-27 01:48:45,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:48:45,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:48:45,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:48:45,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:48:45,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:45" (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 01:48:45,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:48:45,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:48:45,775 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:48:45,775 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:48:45,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:48:45,775 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:48:45,776 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:48:45,776 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:48:45,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:48:45,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:48:45,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:48:45,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:48:45,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:48:45,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:48:45,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:48:45,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:48:45,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:48:46,014 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:48:46,014 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:48:46,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:48:46 BoogieIcfgContainer [2020-10-27 01:48:46,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:48:46,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:48:46,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:48:46,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:48:46,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:48:45" (1/3) ... [2020-10-27 01:48:46,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e71c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:48:46, skipping insertion in model container [2020-10-27 01:48:46,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:45" (2/3) ... [2020-10-27 01:48:46,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e71c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:48:46, skipping insertion in model container [2020-10-27 01:48:46,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:48:46" (3/3) ... [2020-10-27 01:48:46,029 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono5_1.c [2020-10-27 01:48:46,067 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:48:46,072 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:48:46,088 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:48:46,116 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:48:46,117 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:48:46,117 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:48:46,117 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:48:46,117 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:48:46,117 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:48:46,117 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:48:46,117 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:48:46,136 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-27 01:48:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:48:46,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:46,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:46,143 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:46,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:46,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1441742757, now seen corresponding path program 1 times [2020-10-27 01:48:46,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:46,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981867538] [2020-10-27 01:48:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:46,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:46,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:46,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:46,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:48:46,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:46,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-10-27 01:48:46,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:46,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:48:46,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:46,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:48:46,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 01:48:47,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:47,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:47,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:47,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:47,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:47,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 01:48:47,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:47,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:47,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:47,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:47,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:47,150 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 01:48:47,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981867538] [2020-10-27 01:48:47,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:48:47,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:48:47,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629017201] [2020-10-27 01:48:47,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:48:47,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:47,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:48:47,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:48:47,190 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-10-27 01:48:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:47,495 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-10-27 01:48:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:48:47,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-27 01:48:47,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:47,505 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:48:47,505 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:48:47,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:48:47,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:48:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 01:48:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 01:48:47,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-27 01:48:47,555 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2020-10-27 01:48:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:47,556 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-27 01:48:47,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:48:47,556 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-27 01:48:47,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:48:47,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:47,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:47,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:48:47,558 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:47,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:47,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1794150295, now seen corresponding path program 1 times [2020-10-27 01:48:47,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:47,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206797321] [2020-10-27 01:48:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:47,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:47,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:47,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:47,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:48:47,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:47,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-27 01:48:47,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:47,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:48:47,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:47,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:48:47,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:47,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:47,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:47,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:47,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:47,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:47,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:48:47,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:47,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:47,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:47,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:47,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:47,860 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 01:48:47,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206797321] [2020-10-27 01:48:47,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:48:47,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:48:47,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440228706] [2020-10-27 01:48:47,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:48:47,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:47,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:48:47,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:48:47,865 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-10-27 01:48:47,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:47,939 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-27 01:48:47,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:48:47,940 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 01:48:47,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:47,941 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:48:47,941 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:48:47,942 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 01:48:47,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:48:47,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-27 01:48:47,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:48:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-27 01:48:47,950 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-10-27 01:48:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:47,950 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-27 01:48:47,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:48:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-27 01:48:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:48:47,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:47,951 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:47,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:48:47,952 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:47,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:47,952 INFO L82 PathProgramCache]: Analyzing trace with hash 550798258, now seen corresponding path program 1 times [2020-10-27 01:48:47,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:47,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299366710] [2020-10-27 01:48:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:47,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:47,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:48,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:48,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:48,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:48:48,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:48:48,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-27 01:48:48,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:48,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:48:48,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:48,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:48:48,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:48,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:48,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:48,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:48,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:48,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:48,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:48:48,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:48,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:48,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:48,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:48,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:48:48,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299366710] [2020-10-27 01:48:48,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:48,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:48:48,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587017808] [2020-10-27 01:48:48,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:48:48,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:48,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:48:48,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:48:48,341 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2020-10-27 01:48:48,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:48,580 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-27 01:48:48,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:48:48,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 01:48:48,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:48,582 INFO L225 Difference]: With dead ends: 29 [2020-10-27 01:48:48,582 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:48:48,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:48:48,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:48:48,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 01:48:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:48:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-27 01:48:48,590 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2020-10-27 01:48:48,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:48,591 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-27 01:48:48,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:48:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-27 01:48:48,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:48:48,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:48,592 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:48,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:48:48,592 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:48,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:48,593 INFO L82 PathProgramCache]: Analyzing trace with hash 569006663, now seen corresponding path program 2 times [2020-10-27 01:48:48,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:48,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198972892] [2020-10-27 01:48:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:48,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:48,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:48,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:48,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:49,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:49,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:48:49,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:48:49,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-27 01:48:49,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:49,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:48:49,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:49,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:48:49,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:49,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:49,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:49,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:49,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:49,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:49,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:48:49,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:49,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:49,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:49,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:49,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:49,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198972892] [2020-10-27 01:48:49,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:49,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:48:49,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297844830] [2020-10-27 01:48:49,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:48:49,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:49,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:48:49,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:48:49,265 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-10-27 01:48:49,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:49,418 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-27 01:48:49,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:48:49,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 01:48:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:49,420 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:48:49,420 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:48:49,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:48:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:48:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-27 01:48:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:48:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-27 01:48:49,428 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2020-10-27 01:48:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:49,428 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-27 01:48:49,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:48:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-27 01:48:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:48:49,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:49,430 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:49,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:48:49,430 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:49,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:49,431 INFO L82 PathProgramCache]: Analyzing trace with hash 808296871, now seen corresponding path program 3 times [2020-10-27 01:48:49,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:49,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6022130] [2020-10-27 01:48:49,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:49,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:49,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:49,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:49,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:50,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:50,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:52,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:52,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:48:52,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:48:52,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2747 [2020-10-27 01:48:52,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:48:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:48:52,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:52,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:52,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:52,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:52,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:52,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:52,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:48:52,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:52,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:52,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:52,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:52,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:48:52,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6022130] [2020-10-27 01:48:52,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:52,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:48:52,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321247947] [2020-10-27 01:48:52,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:48:52,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:52,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:48:52,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:48:52,323 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2020-10-27 01:48:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:52,548 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-10-27 01:48:52,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:48:52,549 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-27 01:48:52,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:52,550 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:48:52,550 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:48:52,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:48:52,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:48:52,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-27 01:48:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:48:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-27 01:48:52,563 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-10-27 01:48:52,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:52,563 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-27 01:48:52,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:48:52,563 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-27 01:48:52,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:48:52,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:52,566 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:52,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:48:52,566 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:52,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:52,567 INFO L82 PathProgramCache]: Analyzing trace with hash -112521360, now seen corresponding path program 4 times [2020-10-27 01:48:52,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:52,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922729288] [2020-10-27 01:48:52,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:52,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:52,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:52,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:52,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:52,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:53,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:53,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:56,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:56,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:48:56,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:48:56,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4174 [2020-10-27 01:48:56,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:56,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:48:56,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:56,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:48:56,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:57,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:57,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:57,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:57,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:57,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:57,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:48:57,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:57,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:57,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:57,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:57,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:48:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:48:57,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922729288] [2020-10-27 01:48:57,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:57,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:48:57,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483788493] [2020-10-27 01:48:57,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:48:57,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:57,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:48:57,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:48:57,068 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-10-27 01:49:01,749 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-27 01:49:01,924 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-27 01:49:02,418 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-27 01:49:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:05,328 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2020-10-27 01:49:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:49:05,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-27 01:49:05,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:05,336 INFO L225 Difference]: With dead ends: 61 [2020-10-27 01:49:05,336 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:49:05,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:49:05,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:49:05,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 37. [2020-10-27 01:49:05,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:49:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-27 01:49:05,353 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2020-10-27 01:49:05,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:05,353 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-27 01:49:05,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:49:05,354 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-27 01:49:05,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:49:05,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:05,355 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:05,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:49:05,355 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:05,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:05,356 INFO L82 PathProgramCache]: Analyzing trace with hash -616381232, now seen corresponding path program 5 times [2020-10-27 01:49:05,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:05,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431873116] [2020-10-27 01:49:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:05,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:05,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:05,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:05,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:05,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:06,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:06,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:06,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:06,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:10,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:10,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:49:10,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:49:10,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:49:10,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:10,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:49:10,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:10,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:49:10,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:10,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:10,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:10,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:10,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:10,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:10,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:10,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:10,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:10,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:10,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:10,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:10,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431873116] [2020-10-27 01:49:10,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:10,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:49:10,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926674224] [2020-10-27 01:49:10,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:49:10,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:10,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:49:10,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:49:10,579 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-10-27 01:49:11,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:11,182 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2020-10-27 01:49:11,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:49:11,183 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-27 01:49:11,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:11,184 INFO L225 Difference]: With dead ends: 70 [2020-10-27 01:49:11,184 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 01:49:11,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:49:11,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 01:49:11,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-27 01:49:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:49:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-27 01:49:11,198 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 36 [2020-10-27 01:49:11,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:11,198 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-27 01:49:11,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:49:11,198 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-27 01:49:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:49:11,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:11,200 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:11,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:49:11,200 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:11,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:11,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1012983312, now seen corresponding path program 6 times [2020-10-27 01:49:11,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:11,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629628222] [2020-10-27 01:49:11,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:11,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:11,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:11,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:11,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:11,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:11,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:12,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:13,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:13,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:13,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:13,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:14,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:16,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:16,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:49:16,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:49:16,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:49:16,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:49:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:49:16,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:16,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:16,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:16,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:16,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:16,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:16,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:16,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:16,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:16,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:16,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:16,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 23 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:16,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629628222] [2020-10-27 01:49:16,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:16,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:49:16,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851160417] [2020-10-27 01:49:16,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:49:16,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:16,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:49:16,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:49:16,574 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 15 states. [2020-10-27 01:49:17,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:17,559 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2020-10-27 01:49:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:49:17,560 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-27 01:49:17,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:17,561 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:49:17,561 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:49:17,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:49:17,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:49:17,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-27 01:49:17,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:49:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-27 01:49:17,581 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 48 [2020-10-27 01:49:17,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:17,581 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-27 01:49:17,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:49:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-27 01:49:17,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:49:17,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:17,584 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:17,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:49:17,584 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:17,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:17,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1696016208, now seen corresponding path program 7 times [2020-10-27 01:49:17,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:17,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610905061] [2020-10-27 01:49:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:17,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:17,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:17,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:17,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:18,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:18,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:18,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:18,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:18,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:18,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:18,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:19,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:22,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:22,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:49:22,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:49:22,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 01:49:22,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:22,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:49:22,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:22,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:49:22,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:33,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:33,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:33,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:33,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:33,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:33,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:49:33,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:33,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:33,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:33,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:33,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 212 refuted. 9 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-27 01:49:33,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610905061] [2020-10-27 01:49:33,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:33,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:49:33,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234171000] [2020-10-27 01:49:33,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:49:33,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:33,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:49:33,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=80, Unknown=5, NotChecked=0, Total=110 [2020-10-27 01:49:33,918 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 11 states. [2020-10-27 01:49:34,465 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-27 01:49:34,698 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-27 01:49:35,039 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-27 01:49:35,234 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-27 01:49:35,541 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-27 01:49:36,105 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-27 01:49:36,664 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2020-10-27 01:49:37,062 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-27 01:49:39,377 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-27 01:49:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:43,532 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-10-27 01:49:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:49:43,532 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-10-27 01:49:43,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:43,533 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:49:43,534 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 01:49:43,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=240, Invalid=511, Unknown=5, NotChecked=0, Total=756 [2020-10-27 01:49:43,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 01:49:43,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 67. [2020-10-27 01:49:43,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:49:43,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-27 01:49:43,562 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 60 [2020-10-27 01:49:43,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:43,563 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-27 01:49:43,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:49:43,563 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-27 01:49:43,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:49:43,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:43,565 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:43,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:49:43,565 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:43,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:43,566 INFO L82 PathProgramCache]: Analyzing trace with hash 919958704, now seen corresponding path program 8 times [2020-10-27 01:49:43,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:43,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016484113] [2020-10-27 01:49:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:43,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:43,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:43,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:43,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:44,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:44,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:45,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:48,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:48,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 01:49:48,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:49:48,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 01:49:48,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:48,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:49:48,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:48,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:49:48,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:48,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:48,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:48,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:48,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:48,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:48,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:48,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:48,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:48,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:48,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:48,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 215 proven. 222 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-27 01:49:48,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016484113] [2020-10-27 01:49:48,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:48,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:49:48,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794040686] [2020-10-27 01:49:48,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:49:48,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:48,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:49:48,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:49:48,967 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 16 states. [2020-10-27 01:49:50,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:50,062 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2020-10-27 01:49:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:49:50,066 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-10-27 01:49:50,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:50,067 INFO L225 Difference]: With dead ends: 97 [2020-10-27 01:49:50,067 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 01:49:50,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:49:50,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 01:49:50,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-27 01:49:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 01:49:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-10-27 01:49:50,086 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 66 [2020-10-27 01:49:50,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:50,086 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-10-27 01:49:50,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:49:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-10-27 01:49:50,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:49:50,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:50,089 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 13, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:50,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:49:50,089 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:50,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:50,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1121351993, now seen corresponding path program 9 times [2020-10-27 01:49:50,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:50,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213502114] [2020-10-27 01:49:50,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:50,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:50,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:50,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:50,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:50,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:50,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:50,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:50,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:50,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:50,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:53,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:53,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:53,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:54,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:54,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:55,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:55,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:49:55,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 01:49:55,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 01:49:55,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:49:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:49:55,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:55,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:55,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:55,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:55,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:55,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:55,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:55,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:55,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:55,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:55,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:55,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 232 proven. 260 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-27 01:49:55,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213502114] [2020-10-27 01:49:55,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:55,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:49:55,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608786034] [2020-10-27 01:49:55,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:49:55,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:55,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:49:55,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:49:55,536 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 17 states. [2020-10-27 01:49:56,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:56,872 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2020-10-27 01:49:56,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:49:56,873 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-10-27 01:49:56,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:56,874 INFO L225 Difference]: With dead ends: 100 [2020-10-27 01:49:56,874 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:49:56,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:49:56,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:49:56,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-27 01:49:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:49:56,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-10-27 01:49:56,893 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 69 [2020-10-27 01:49:56,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:56,893 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-10-27 01:49:56,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:49:56,893 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-10-27 01:49:56,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:49:56,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:56,895 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 14, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:56,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:49:56,895 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:56,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:56,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1366382256, now seen corresponding path program 10 times [2020-10-27 01:49:56,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:56,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985894273] [2020-10-27 01:49:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:56,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:56,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:57,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:57,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:57,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:57,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:57,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:57,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:57,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:58,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:58,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:59,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:59,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:00,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:00,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:00,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:01,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:01,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:01,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:01,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:01,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:50:01,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 01:50:01,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 01:50:01,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:01,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:50:01,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:01,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:50:01,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:02,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:02,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:02,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:02,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:02,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:02,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:50:02,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:02,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:02,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:02,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:02,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-27 01:50:02,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985894273] [2020-10-27 01:50:02,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:02,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:50:02,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120356226] [2020-10-27 01:50:02,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:50:02,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:02,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:50:02,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:50:02,934 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 18 states. [2020-10-27 01:50:03,667 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-27 01:50:07,919 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 62 [2020-10-27 01:50:08,285 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-27 01:50:13,181 WARN L193 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-27 01:50:13,965 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-27 01:50:16,582 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-27 01:50:21,439 WARN L193 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-27 01:50:21,847 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2020-10-27 01:50:27,571 WARN L193 SmtUtils]: Spent 5.64 s on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2020-10-27 01:50:28,660 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2020-10-27 01:50:31,417 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 96 DAG size of output: 54 [2020-10-27 01:50:40,219 WARN L193 SmtUtils]: Spent 7.06 s on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2020-10-27 01:50:46,275 WARN L193 SmtUtils]: Spent 5.84 s on a formula simplification. DAG size of input: 103 DAG size of output: 54 [2020-10-27 01:50:54,550 WARN L193 SmtUtils]: Spent 7.76 s on a formula simplification. DAG size of input: 104 DAG size of output: 55 [2020-10-27 01:50:56,592 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 (- 1)))) (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= 3 (+ (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999998)) 4294967296)) c_main_~x~0)) (<= 9 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999992)) 4294967296)))) (<= 1 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 5000000)) 4294967296)))) (= |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) (<= 5 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999996)) 4294967296)))) (<= 8 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999993)) 4294967296)))) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (<= 4 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999997)) 4294967296)))) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (<= 6 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999995)) 4294967296)))) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 2 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999999)) 4294967296)))) (<= 7 (+ (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999994)) 4294967296)) c_main_~x~0)) (= |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 01:51:02,429 WARN L193 SmtUtils]: Spent 5.03 s on a formula simplification. DAG size of input: 81 DAG size of output: 25 [2020-10-27 01:51:03,421 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 55 [2020-10-27 01:51:06,145 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 117 DAG size of output: 54 [2020-10-27 01:51:12,534 WARN L193 SmtUtils]: Spent 5.99 s on a formula simplification. DAG size of input: 118 DAG size of output: 55 [2020-10-27 01:51:18,976 WARN L193 SmtUtils]: Spent 6.29 s on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2020-10-27 01:51:40,616 WARN L193 SmtUtils]: Spent 14.88 s on a formula simplification. DAG size of input: 125 DAG size of output: 55 [2020-10-27 01:51:56,071 WARN L193 SmtUtils]: Spent 15.30 s on a formula simplification. DAG size of input: 131 DAG size of output: 54 [2020-10-27 01:52:13,487 WARN L193 SmtUtils]: Spent 16.03 s on a formula simplification. DAG size of input: 118 DAG size of output: 55 [2020-10-27 01:52:33,119 WARN L193 SmtUtils]: Spent 16.23 s on a formula simplification. DAG size of input: 111 DAG size of output: 55 [2020-10-27 01:52:41,672 WARN L193 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 104 DAG size of output: 55 [2020-10-27 01:52:47,842 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 (- 1)))) (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= 12 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999989)) 4294967296)))) (<= 9 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999992)) 4294967296)))) (= |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) (<= 5 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999996)) 4294967296)))) (<= 8 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999993)) 4294967296)))) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (<= 4 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999997)) 4294967296)))) (<= 11 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999990)) 4294967296)))) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (<= 6 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999995)) 4294967296)))) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 2 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999999)) 4294967296)))) (<= 10 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999991)) 4294967296)))) (<= 7 (+ (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999994)) 4294967296)) c_main_~x~0)) (= |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 01:52:57,273 WARN L193 SmtUtils]: Spent 5.03 s on a formula simplification. DAG size of input: 97 DAG size of output: 55