/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_break.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:58:57,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:58:57,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:58:57,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:58:57,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:58:57,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:58:57,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:58:57,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:58:57,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:58:57,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:58:57,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:58:57,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:58:57,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:58:57,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:58:57,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:58:57,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:58:57,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:58:57,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:58:57,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:58:58,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:58:58,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:58:58,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:58:58,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:58:58,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:58:58,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:58:58,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:58:58,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:58:58,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:58:58,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:58:58,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:58:58,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:58:58,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:58:58,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:58:58,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:58:58,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:58:58,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:58:58,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:58:58,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:58:58,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:58:58,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:58:58,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:58:58,036 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 [2020-10-29 03:58:58,061 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:58:58,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:58:58,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:58:58,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:58:58,063 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:58:58,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:58:58,064 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:58:58,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:58:58,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:58:58,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:58:58,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:58:58,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:58:58,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:58:58,065 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:58:58,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:58:58,066 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:58:58,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:58:58,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:58:58,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:58:58,066 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:58:58,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:58:58,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:58:58,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:58:58,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:58:58,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:58:58,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:58:58,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:58:58,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:58:58,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:58:58,068 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:58:58,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:58:58,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:58:58,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:58:58,437 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:58:58,438 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:58:58,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_break.i [2020-10-29 03:58:58,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/509501b57/4b091a758b554e56a4546442bae9d61b/FLAGfb7740f28 [2020-10-29 03:58:59,158 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:58:59,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_break.i [2020-10-29 03:58:59,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/509501b57/4b091a758b554e56a4546442bae9d61b/FLAGfb7740f28 [2020-10-29 03:58:59,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/509501b57/4b091a758b554e56a4546442bae9d61b [2020-10-29 03:58:59,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:58:59,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:58:59,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:58:59,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:58:59,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:58:59,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:58:59" (1/1) ... [2020-10-29 03:58:59,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23071b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:58:59, skipping insertion in model container [2020-10-29 03:58:59,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:58:59" (1/1) ... [2020-10-29 03:58:59,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:58:59,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:58:59,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:59:01,572 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:59:01,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:59:01,620 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:59:01,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:01 WrapperNode [2020-10-29 03:59:01,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:59:01,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:59:01,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:59:01,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:59:01,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:01" (1/1) ... [2020-10-29 03:59:01,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:01" (1/1) ... [2020-10-29 03:59:01,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:01" (1/1) ... [2020-10-29 03:59:01,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:01" (1/1) ... [2020-10-29 03:59:01,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:01" (1/1) ... [2020-10-29 03:59:01,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:01" (1/1) ... [2020-10-29 03:59:01,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:01" (1/1) ... [2020-10-29 03:59:01,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:59:01,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:59:01,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:59:01,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:59:01,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:01" (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 [2020-10-29 03:59:01,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:59:01,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:59:01,744 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:59:01,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:59:01,744 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:59:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:59:01,745 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:59:01,745 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 03:59:01,745 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 03:59:01,745 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:59:01,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:59:01,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 03:59:01,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:59:01,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:59:01,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:59:01,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:59:01,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:59:01,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:59:01,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:59:01,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:59:02,075 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:59:02,075 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 03:59:02,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:59:02 BoogieIcfgContainer [2020-10-29 03:59:02,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:59:02,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:59:02,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:59:02,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:59:02,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:58:59" (1/3) ... [2020-10-29 03:59:02,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30831a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:59:02, skipping insertion in model container [2020-10-29 03:59:02,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:01" (2/3) ... [2020-10-29 03:59:02,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30831a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:59:02, skipping insertion in model container [2020-10-29 03:59:02,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:59:02" (3/3) ... [2020-10-29 03:59:02,086 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_break.i [2020-10-29 03:59:02,098 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:59:02,103 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:59:02,118 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:59:02,145 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:59:02,145 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:59:02,145 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:59:02,146 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:59:02,146 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:59:02,146 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:59:02,146 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:59:02,146 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:59:02,164 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-29 03:59:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 03:59:02,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:02,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:02,171 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:02,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:02,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1575655028, now seen corresponding path program 1 times [2020-10-29 03:59:02,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:02,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569164541] [2020-10-29 03:59:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:02,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:02,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:02,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 03:59:02,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:02,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-29 03:59:02,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:02,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:02,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:02,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:59:02,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:02,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 03:59:02,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:02,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:02,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:02,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:02,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:02,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 03:59:02,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:02,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:02,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:02,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:02,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:02,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:02,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569164541] [2020-10-29 03:59:02,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:59:02,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 03:59:02,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783470514] [2020-10-29 03:59:02,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 03:59:02,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:02,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 03:59:02,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 03:59:02,704 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-10-29 03:59:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:02,836 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-10-29 03:59:02,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 03:59:02,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-29 03:59:02,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:02,847 INFO L225 Difference]: With dead ends: 61 [2020-10-29 03:59:02,847 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 03:59:02,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 03:59:02,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 03:59:02,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-10-29 03:59:02,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-29 03:59:02,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-29 03:59:02,895 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2020-10-29 03:59:02,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:02,895 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-29 03:59:02,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 03:59:02,896 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-29 03:59:02,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 03:59:02,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:02,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:02,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:59:02,897 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:02,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:02,898 INFO L82 PathProgramCache]: Analyzing trace with hash 585993527, now seen corresponding path program 1 times [2020-10-29 03:59:02,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:02,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748914000] [2020-10-29 03:59:02,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:02,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:03,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:03,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 03:59:03,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:03,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-29 03:59:03,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:03,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:03,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:03,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:59:03,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:03,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:03,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:03,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:03,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:03,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:03,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:03,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 03:59:03,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:03,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:03,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:03,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:03,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:03,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:03,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748914000] [2020-10-29 03:59:03,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:59:03,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 03:59:03,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478770871] [2020-10-29 03:59:03,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 03:59:03,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:03,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 03:59:03,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 03:59:03,167 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2020-10-29 03:59:03,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:03,395 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-10-29 03:59:03,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 03:59:03,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-29 03:59:03,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:03,397 INFO L225 Difference]: With dead ends: 56 [2020-10-29 03:59:03,398 INFO L226 Difference]: Without dead ends: 42 [2020-10-29 03:59:03,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:59:03,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-29 03:59:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 24. [2020-10-29 03:59:03,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 03:59:03,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-29 03:59:03,408 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2020-10-29 03:59:03,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:03,409 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-29 03:59:03,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 03:59:03,409 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-29 03:59:03,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 03:59:03,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:03,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:03,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:59:03,411 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:03,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:03,411 INFO L82 PathProgramCache]: Analyzing trace with hash 836905597, now seen corresponding path program 1 times [2020-10-29 03:59:03,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:03,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835179280] [2020-10-29 03:59:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:03,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:03,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:03,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 03:59:03,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:03,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-29 03:59:03,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:03,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:03,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:03,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:59:03,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 03:59:03,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:03,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:03,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:03,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:03,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:03,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:03,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:59:03,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:03,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:03,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:03,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:03,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:03,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:03,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835179280] [2020-10-29 03:59:03,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:59:03,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 03:59:03,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000989449] [2020-10-29 03:59:03,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 03:59:03,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:03,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 03:59:03,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 03:59:03,576 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-10-29 03:59:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:03,728 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-29 03:59:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 03:59:03,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-29 03:59:03,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:03,730 INFO L225 Difference]: With dead ends: 46 [2020-10-29 03:59:03,730 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 03:59:03,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:59:03,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 03:59:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-29 03:59:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 03:59:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-29 03:59:03,737 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 17 [2020-10-29 03:59:03,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:03,738 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-29 03:59:03,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 03:59:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-29 03:59:03,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 03:59:03,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:03,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:03,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:59:03,739 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:03,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1977759324, now seen corresponding path program 1 times [2020-10-29 03:59:03,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:03,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541721255] [2020-10-29 03:59:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:03,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:03,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:04,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:04,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 03:59:04,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:59:04,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-29 03:59:04,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:04,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:04,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 03:59:04,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:59:04,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 03:59:04,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:04,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:04,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:04,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:04,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:04,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:04,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 03:59:04,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:04,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:04,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:04,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:04,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:04,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:04,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541721255] [2020-10-29 03:59:04,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:04,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 03:59:04,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375165853] [2020-10-29 03:59:04,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 03:59:04,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:04,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 03:59:04,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 03:59:04,345 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-10-29 03:59:05,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:05,156 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-10-29 03:59:05,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 03:59:05,157 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-29 03:59:05,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:05,158 INFO L225 Difference]: With dead ends: 39 [2020-10-29 03:59:05,158 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 03:59:05,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:59:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 03:59:05,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-10-29 03:59:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 03:59:05,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-29 03:59:05,168 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 19 [2020-10-29 03:59:05,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:05,168 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-29 03:59:05,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 03:59:05,168 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-29 03:59:05,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 03:59:05,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:05,170 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:05,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:59:05,170 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:05,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:05,171 INFO L82 PathProgramCache]: Analyzing trace with hash -438331880, now seen corresponding path program 1 times [2020-10-29 03:59:05,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:05,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705568270] [2020-10-29 03:59:05,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:05,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:05,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:05,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:05,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:05,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 03:59:05,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:59:05,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 709 [2020-10-29 03:59:05,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:05,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:05,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:59:05,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:05,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 03:59:05,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 03:59:06,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:06,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:06,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:06,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:06,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:06,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 03:59:06,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:06,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:06,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:06,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:06,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:06,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:06,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-29 03:59:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:06,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:06,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:06,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:06,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:06,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:59:06,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:06,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:06,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:59:06,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 03:59:06,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:59:06,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:06,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705568270] [2020-10-29 03:59:06,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:06,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 03:59:06,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999215502] [2020-10-29 03:59:06,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 03:59:06,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:06,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 03:59:06,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:59:06,361 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 11 states. [2020-10-29 03:59:06,636 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-29 03:59:06,827 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-10-29 03:59:07,405 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-29 03:59:07,579 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-10-29 03:59:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:07,875 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-29 03:59:07,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:59:07,876 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-29 03:59:07,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:07,879 INFO L225 Difference]: With dead ends: 56 [2020-10-29 03:59:07,879 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 03:59:07,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:59:07,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 03:59:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-29 03:59:07,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 03:59:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-29 03:59:07,889 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2020-10-29 03:59:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:07,890 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-29 03:59:07,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 03:59:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-29 03:59:07,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 03:59:07,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:07,891 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:07,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:59:07,892 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:07,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:07,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1214224133, now seen corresponding path program 2 times [2020-10-29 03:59:07,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:07,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012345435] [2020-10-29 03:59:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:07,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:07,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:08,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:08,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:08,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:08,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 03:59:08,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:59:08,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 857 [2020-10-29 03:59:08,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:08,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:08,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 03:59:08,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:59:08,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 03:59:08,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 03:59:08,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:08,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:08,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:08,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:08,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:08,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:59:08,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:08,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:08,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:08,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:08,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:08,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:09,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-29 03:59:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:09,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:09,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:09,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:09,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:09,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:59:09,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:09,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:09,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:09,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:09,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:59:09,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:09,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012345435] [2020-10-29 03:59:09,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:09,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 03:59:09,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672552618] [2020-10-29 03:59:09,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 03:59:09,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:09,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 03:59:09,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:59:09,027 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 11 states. [2020-10-29 03:59:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:09,897 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-10-29 03:59:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 03:59:09,898 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-29 03:59:09,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:09,900 INFO L225 Difference]: With dead ends: 51 [2020-10-29 03:59:09,900 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 03:59:09,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:59:09,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 03:59:09,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-10-29 03:59:09,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 03:59:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-29 03:59:09,914 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 31 [2020-10-29 03:59:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:09,914 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-29 03:59:09,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 03:59:09,915 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-29 03:59:09,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 03:59:09,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:09,918 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:09,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:59:09,918 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:09,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2639319, now seen corresponding path program 3 times [2020-10-29 03:59:09,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:09,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834817659] [2020-10-29 03:59:09,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:09,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:09,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:10,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:10,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:10,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:10,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:10,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:10,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:10,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:13,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:13,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 03:59:13,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 03:59:13,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3142 [2020-10-29 03:59:13,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:13,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:13,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:59:13,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:13,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 03:59:13,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:13,452 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-29 03:59:13,604 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-29 03:59:13,780 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-29 03:59:13,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:13,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:13,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:13,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:13,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:13,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 03:59:13,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:13,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:13,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:13,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:13,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:13,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:13,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-29 03:59:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:13,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:13,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:13,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:13,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:13,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 03:59:13,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:13,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:13,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:13,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:13,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:59:13,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:13,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-29 03:59:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:13,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:13,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:13,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:13,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:13,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:59:13,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:13,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:13,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:59:13,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 03:59:13,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:59:13,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 03:59:14,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834817659] [2020-10-29 03:59:14,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:14,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:59:14,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850038387] [2020-10-29 03:59:14,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:59:14,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:14,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:59:14,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:59:14,064 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 14 states. [2020-10-29 03:59:14,289 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 40 [2020-10-29 03:59:14,661 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-29 03:59:15,054 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-29 03:59:15,287 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-29 03:59:15,531 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-29 03:59:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:15,943 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-29 03:59:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:59:15,944 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-29 03:59:15,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:15,945 INFO L225 Difference]: With dead ends: 77 [2020-10-29 03:59:15,945 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 03:59:15,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:59:15,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 03:59:15,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-29 03:59:15,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 03:59:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-29 03:59:15,956 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2020-10-29 03:59:15,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:15,956 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-29 03:59:15,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:59:15,956 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-29 03:59:15,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 03:59:15,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:15,958 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:15,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:59:15,958 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:15,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:15,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1911900996, now seen corresponding path program 4 times [2020-10-29 03:59:15,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:15,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282811943] [2020-10-29 03:59:15,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:15,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:15,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:16,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:16,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:16,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:17,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:17,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:17,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:17,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:17,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:20,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:20,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:59:20,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:59:20,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:59:20,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:20,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:20,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:59:20,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:59:20,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 03:59:20,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:21,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:21,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:21,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:21,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:21,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:21,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:59:21,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:21,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:21,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:21,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:21,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:21,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:21,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-29 03:59:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:21,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:21,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:21,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:21,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:21,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:59:21,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:21,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:21,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:21,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:21,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:59:21,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:21,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-29 03:59:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:21,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:21,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:21,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:21,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:21,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:59:21,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:21,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:21,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:21,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:21,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:59:21,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:59:21,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282811943] [2020-10-29 03:59:21,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:21,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:59:21,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134221926] [2020-10-29 03:59:21,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:59:21,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:21,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:59:21,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:59:21,269 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 13 states. [2020-10-29 03:59:22,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:22,276 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-10-29 03:59:22,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 03:59:22,277 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-29 03:59:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:22,279 INFO L225 Difference]: With dead ends: 63 [2020-10-29 03:59:22,279 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 03:59:22,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:59:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 03:59:22,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-10-29 03:59:22,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 03:59:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-29 03:59:22,289 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 43 [2020-10-29 03:59:22,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:22,290 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-29 03:59:22,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:59:22,290 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-29 03:59:22,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 03:59:22,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:22,291 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:22,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:59:22,291 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:22,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:22,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1882199944, now seen corresponding path program 5 times [2020-10-29 03:59:22,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:22,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155608951] [2020-10-29 03:59:22,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:22,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:22,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:22,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:22,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:22,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:22,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:23,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:24,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:24,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:24,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:24,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:24,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:24,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:24,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:24,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:24,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:25,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:25,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:25,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:25,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:26,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:27,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:27,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 03:59:27,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-29 03:59:27,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:59:27,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:27,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:27,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 03:59:27,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:27,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 03:59:27,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:27,830 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-10-29 03:59:28,019 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-29 03:59:28,491 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-29 03:59:28,893 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-29 03:59:29,305 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2020-10-29 03:59:29,759 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-10-29 03:59:30,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:30,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:30,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:30,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:30,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:30,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 03:59:30,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:30,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:30,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:30,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:30,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:30,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:30,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-29 03:59:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:30,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:30,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:30,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:30,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:30,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 03:59:30,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:30,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:30,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:30,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:30,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:59:30,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:30,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-29 03:59:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:30,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:30,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:30,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:30,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:30,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-29 03:59:30,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:30,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:30,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:30,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:30,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:59:30,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:30,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-29 03:59:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:30,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:30,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:30,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:30,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:30,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:59:30,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:30,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:30,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:59:30,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 03:59:30,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:59:30,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 03:59:30,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155608951] [2020-10-29 03:59:30,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:30,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:59:30,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283987395] [2020-10-29 03:59:30,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:59:30,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:30,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:59:30,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:59:30,305 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 17 states. [2020-10-29 03:59:30,881 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 45 [2020-10-29 03:59:31,484 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 72 [2020-10-29 03:59:31,930 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2020-10-29 03:59:34,116 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2020-10-29 03:59:34,590 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-29 03:59:35,451 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-10-29 03:59:36,449 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 101 [2020-10-29 03:59:36,938 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-29 03:59:37,332 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-29 03:59:37,718 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-29 03:59:38,844 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2020-10-29 03:59:39,869 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 102 [2020-10-29 03:59:40,397 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-29 03:59:41,324 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2020-10-29 03:59:41,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:41,551 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-29 03:59:41,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:59:41,552 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-29 03:59:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:41,553 INFO L225 Difference]: With dead ends: 98 [2020-10-29 03:59:41,554 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 03:59:41,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 03:59:41,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 03:59:41,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-29 03:59:41,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 03:59:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-29 03:59:41,571 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 52 [2020-10-29 03:59:41,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:41,573 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-29 03:59:41,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:59:41,573 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-29 03:59:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 03:59:41,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:41,575 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:41,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:59:41,575 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:41,576 INFO L82 PathProgramCache]: Analyzing trace with hash -754503067, now seen corresponding path program 6 times [2020-10-29 03:59:41,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:41,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646220951] [2020-10-29 03:59:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:41,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:41,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:41,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:41,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:42,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:42,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:42,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:42,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:43,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:43,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:43,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:43,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:43,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:44,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:44,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:44,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:45,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:46,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:46,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:59:46,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 03:59:46,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:59:46,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:46,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:59:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 03:59:46,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:47,863 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-29 03:59:48,448 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-29 03:59:49,485 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2020-10-29 03:59:50,120 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-29 03:59:50,798 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-10-29 03:59:51,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:51,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:51,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:51,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:51,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:51,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:59:51,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:51,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:51,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:51,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:51,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:51,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:51,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-29 03:59:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:51,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:51,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:51,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:51,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:51,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-29 03:59:51,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:51,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:51,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:51,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:51,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:59:51,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:51,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-29 03:59:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:51,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:51,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:51,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:51,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:51,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:59:51,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:51,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:51,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:59:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 03:59:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:59:51,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:51,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-29 03:59:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:51,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:51,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:51,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:51,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:51,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:59:51,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:51,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:51,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:51,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:59:51,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:51,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-29 03:59:51,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646220951] [2020-10-29 03:59:51,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:51,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:59:51,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312083375] [2020-10-29 03:59:51,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:59:51,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:51,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:59:51,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:59:51,482 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 18 states. [2020-10-29 03:59:51,932 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 30 [2020-10-29 03:59:53,955 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-10-29 03:59:55,613 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2020-10-29 03:59:56,628 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-29 03:59:57,468 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-29 03:59:58,263 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-29 03:59:59,314 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-29 04:00:00,565 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-10-29 04:00:01,821 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-10-29 04:00:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:00:02,213 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-10-29 04:00:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 04:00:02,215 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-29 04:00:02,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:00:02,217 INFO L225 Difference]: With dead ends: 101 [2020-10-29 04:00:02,217 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 04:00:02,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2020-10-29 04:00:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 04:00:02,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-29 04:00:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 04:00:02,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-29 04:00:02,235 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 55 [2020-10-29 04:00:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:00:02,235 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-29 04:00:02,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 04:00:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-29 04:00:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 04:00:02,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:02,237 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:00:02,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 04:00:02,237 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:02,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:02,240 INFO L82 PathProgramCache]: Analyzing trace with hash -771029672, now seen corresponding path program 7 times [2020-10-29 04:00:02,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:02,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597811094] [2020-10-29 04:00:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:02,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:02,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:02,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:02,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:02,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:02,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:03,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:03,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:04,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:04,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:04,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:04,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:04,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:05,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:07,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:07,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 04:00:07,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 04:00:07,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 04:00:07,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:07,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:07,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 04:00:07,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:00:07,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 04:00:07,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:09,643 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2020-10-29 04:00:10,544 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-10-29 04:00:11,980 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 98 [2020-10-29 04:00:14,920 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 101 [2020-10-29 04:00:17,818 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 161 DAG size of output: 119 [2020-10-29 04:00:19,881 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 157 DAG size of output: 119 [2020-10-29 04:00:21,731 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 160 DAG size of output: 120 [2020-10-29 04:00:24,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:00:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:24,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:24,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:24,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:00:24,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:24,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 04:00:24,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:24,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:24,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:00:24,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:24,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:00:24,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:24,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-29 04:00:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:24,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:24,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:24,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:00:24,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:24,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-29 04:00:24,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:24,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:24,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:00:24,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:24,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:00:24,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:24,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-29 04:00:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:24,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:24,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:24,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:00:24,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:24,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:00:24,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:24,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:24,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 04:00:24,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 04:00:24,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:00:24,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:25,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-29 04:00:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:25,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:25,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:25,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:00:25,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:25,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 04:00:25,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:25,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:25,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:00:25,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 04:00:25,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:00:25,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 41 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-29 04:00:25,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597811094] [2020-10-29 04:00:25,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:00:25,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 04:00:25,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918360911] [2020-10-29 04:00:25,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 04:00:25,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:00:25,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 04:00:25,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-10-29 04:00:25,204 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2020-10-29 04:00:25,572 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-29 04:00:25,877 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 33 [2020-10-29 04:00:31,510 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2020-10-29 04:00:36,799 WARN L193 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 170 DAG size of output: 156 [2020-10-29 04:00:40,118 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 04:00:41,981 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 04:00:43,924 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 04:00:46,976 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 04:00:49,999 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 144 DAG size of output: 139 [2020-10-29 04:00:53,069 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 146 DAG size of output: 141 [2020-10-29 04:00:53,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:00:53,736 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-10-29 04:00:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 04:00:53,737 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2020-10-29 04:00:53,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:00:53,739 INFO L225 Difference]: With dead ends: 104 [2020-10-29 04:00:53,739 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 04:00:53,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 04:00:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 04:00:53,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-29 04:00:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 04:00:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-10-29 04:00:53,751 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 58 [2020-10-29 04:00:53,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:00:53,752 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-10-29 04:00:53,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 04:00:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-10-29 04:00:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 04:00:53,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:53,753 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:00:53,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 04:00:53,754 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:53,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:53,754 INFO L82 PathProgramCache]: Analyzing trace with hash 806119813, now seen corresponding path program 8 times [2020-10-29 04:00:53,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:53,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131744510] [2020-10-29 04:00:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:53,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:53,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:53,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:54,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:54,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:54,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:55,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:55,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:55,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:56,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:56,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:56,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:56,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:58,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:58,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 04:00:58,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 04:00:58,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 04:00:58,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:58,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:58,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 04:00:58,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:00:58,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 04:00:58,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:04,332 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-29 04:01:04,634 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-29 04:01:05,160 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 54 [2020-10-29 04:01:05,927 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-10-29 04:01:07,096 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 68 [2020-10-29 04:01:09,324 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 71 [2020-10-29 04:01:12,069 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 83 [2020-10-29 04:01:18,653 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 175 DAG size of output: 86 [2020-10-29 04:01:25,713 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 222 DAG size of output: 97 [2020-10-29 04:01:29,884 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 193 DAG size of output: 96 [2020-10-29 04:01:35,391 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 199 DAG size of output: 97 [2020-10-29 04:01:46,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:46,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:46,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:46,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:46,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:46,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 04:01:46,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:46,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:46,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:46,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:46,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:46,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:46,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-29 04:01:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:46,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:47,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:47,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:01:47,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:47,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-29 04:01:47,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:47,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:47,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:47,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:47,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:01:47,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:47,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-29 04:01:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:47,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:47,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:47,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:01:47,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:47,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:01:47,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:47,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:47,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 04:01:47,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 04:01:47,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:01:47,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:47,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-29 04:01:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:47,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:47,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:47,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:01:47,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:47,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 04:01:47,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:47,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:47,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:01:47,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 04:01:47,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:01:47,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 57 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-29 04:01:47,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131744510] [2020-10-29 04:01:47,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:47,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 04:01:47,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780724551] [2020-10-29 04:01:47,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 04:01:47,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:47,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 04:01:47,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=338, Unknown=1, NotChecked=0, Total=462 [2020-10-29 04:01:47,374 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 22 states.