/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:27:16,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:27:17,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:27:17,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:27:17,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:27:17,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:27:17,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:27:17,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:27:17,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:27:17,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:27:17,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:27:17,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:27:17,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:27:17,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:27:17,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:27:17,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:27:17,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:27:17,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:27:17,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:27:17,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:27:17,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:27:17,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:27:17,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:27:17,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:27:17,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:27:17,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:27:17,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:27:17,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:27:17,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:27:17,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:27:17,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:27:17,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:27:17,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:27:17,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:27:17,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:27:17,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:27:17,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:27:17,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:27:17,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:27:17,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:27:17,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:27:17,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:27:17,129 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:27:17,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:27:17,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:27:17,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:27:17,133 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:27:17,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:27:17,134 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:27:17,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:27:17,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:27:17,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:27:17,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:27:17,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:27:17,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:27:17,139 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:27:17,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:27:17,139 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:27:17,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:27:17,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:27:17,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:27:17,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:27:17,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:27:17,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:27:17,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:27:17,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:27:17,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:27:17,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:27:17,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:27:17,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:27:17,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:27:17,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:27:17,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:27:17,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:27:17,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:27:17,633 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:27:17,633 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:27:17,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i [2020-10-27 14:27:17,714 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd715850f/a17793ea416044aba506eec222747312/FLAGef85c85f7 [2020-10-27 14:27:18,246 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:27:18,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i [2020-10-27 14:27:18,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd715850f/a17793ea416044aba506eec222747312/FLAGef85c85f7 [2020-10-27 14:27:18,614 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd715850f/a17793ea416044aba506eec222747312 [2020-10-27 14:27:18,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:27:18,626 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:27:18,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:27:18,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:27:18,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:27:18,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:27:18" (1/1) ... [2020-10-27 14:27:18,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c0761c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:27:18, skipping insertion in model container [2020-10-27 14:27:18,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:27:18" (1/1) ... [2020-10-27 14:27:18,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:27:18,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:27:18,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:27:18,833 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:27:18,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:27:18,867 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:27:18,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:27:18 WrapperNode [2020-10-27 14:27:18,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:27:18,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:27:18,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:27:18,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:27:18,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:27:18" (1/1) ... [2020-10-27 14:27:18,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:27:18" (1/1) ... [2020-10-27 14:27:18,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:27:18" (1/1) ... [2020-10-27 14:27:18,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:27:18" (1/1) ... [2020-10-27 14:27:18,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:27:18" (1/1) ... [2020-10-27 14:27:18,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:27:18" (1/1) ... [2020-10-27 14:27:18,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:27:18" (1/1) ... [2020-10-27 14:27:18,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:27:18,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:27:18,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:27:18,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:27:18,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:27:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:27:18,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:27:18,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:27:18,985 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:27:18,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:27:18,986 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:27:18,986 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:27:18,986 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:27:18,986 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:27:18,987 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:27:18,987 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:27:18,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:27:18,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:27:18,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:27:18,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:27:18,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:27:18,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:27:18,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:27:18,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:27:18,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:27:18,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:27:19,358 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:27:19,359 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:27:19,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:27:19 BoogieIcfgContainer [2020-10-27 14:27:19,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:27:19,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:27:19,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:27:19,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:27:19,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:27:18" (1/3) ... [2020-10-27 14:27:19,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef4773a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:27:19, skipping insertion in model container [2020-10-27 14:27:19,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:27:18" (2/3) ... [2020-10-27 14:27:19,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef4773a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:27:19, skipping insertion in model container [2020-10-27 14:27:19,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:27:19" (3/3) ... [2020-10-27 14:27:19,368 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-2.i [2020-10-27 14:27:19,380 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:27:19,385 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:27:19,399 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:27:19,428 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:27:19,428 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:27:19,428 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:27:19,428 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:27:19,429 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:27:19,429 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:27:19,429 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:27:19,429 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:27:19,467 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-27 14:27:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:27:19,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:19,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:19,501 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:19,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:19,518 INFO L82 PathProgramCache]: Analyzing trace with hash -368075238, now seen corresponding path program 1 times [2020-10-27 14:27:19,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:19,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046651771] [2020-10-27 14:27:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:19,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:19,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:19,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:19,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:27:19,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:27:19,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-27 14:27:19,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:19,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:19,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:27:19,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:19,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:27:20,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:20,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:20,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:20,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:20,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:20,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 14:27:20,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:20,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:20,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:20,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:20,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:27:20,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046651771] [2020-10-27 14:27:20,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:27:20,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:27:20,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025539894] [2020-10-27 14:27:20,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:27:20,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:20,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:27:20,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:27:20,179 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-27 14:27:20,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:20,268 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2020-10-27 14:27:20,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:27:20,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-27 14:27:20,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:20,278 INFO L225 Difference]: With dead ends: 55 [2020-10-27 14:27:20,278 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 14:27:20,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:27:20,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 14:27:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 14:27:20,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 14:27:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-27 14:27:20,322 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-27 14:27:20,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:20,323 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-27 14:27:20,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:27:20,323 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-27 14:27:20,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:27:20,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:20,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:20,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:27:20,325 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:20,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:20,326 INFO L82 PathProgramCache]: Analyzing trace with hash 230860937, now seen corresponding path program 1 times [2020-10-27 14:27:20,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:20,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006059327] [2020-10-27 14:27:20,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:20,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:20,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:20,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:20,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:27:20,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:27:20,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-27 14:27:20,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:20,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:27:20,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:20,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:27:20,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:20,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:20,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:20,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:20,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:20,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:20,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:27:20,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:20,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:20,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:20,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:20,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:27:20,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006059327] [2020-10-27 14:27:20,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:27:20,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:27:20,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776863076] [2020-10-27 14:27:20,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:27:20,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:20,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:27:20,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:27:20,614 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-10-27 14:27:20,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:20,698 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-10-27 14:27:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:27:20,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-27 14:27:20,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:20,700 INFO L225 Difference]: With dead ends: 47 [2020-10-27 14:27:20,700 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 14:27:20,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:27:20,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 14:27:20,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-27 14:27:20,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 14:27:20,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-27 14:27:20,710 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-10-27 14:27:20,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:20,711 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-27 14:27:20,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:27:20,711 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-27 14:27:20,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 14:27:20,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:20,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:20,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:27:20,713 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:20,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:20,714 INFO L82 PathProgramCache]: Analyzing trace with hash -255982583, now seen corresponding path program 1 times [2020-10-27 14:27:20,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:20,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020539963] [2020-10-27 14:27:20,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:20,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:20,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:20,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:21,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:21,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 14:27:21,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:21,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-10-27 14:27:21,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:21,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:27:21,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:27:21,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:27:21,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:21,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:21,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:21,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:21,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:21,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:21,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:27:21,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:21,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:27:21,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020539963] [2020-10-27 14:27:21,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:21,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:27:21,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345676955] [2020-10-27 14:27:21,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:27:21,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:21,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:27:21,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:27:21,802 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-27 14:27:21,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:21,886 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-27 14:27:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:27:21,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 14:27:21,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:21,888 INFO L225 Difference]: With dead ends: 53 [2020-10-27 14:27:21,888 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 14:27:21,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:27:21,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 14:27:21,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-27 14:27:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 14:27:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-27 14:27:21,897 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-27 14:27:21,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:21,897 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-27 14:27:21,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:27:21,897 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-27 14:27:21,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:27:21,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:21,898 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:21,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:27:21,899 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:21,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:21,900 INFO L82 PathProgramCache]: Analyzing trace with hash 768417029, now seen corresponding path program 2 times [2020-10-27 14:27:21,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:21,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023661837] [2020-10-27 14:27:21,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:21,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:21,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:21,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:23,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:23,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:27:23,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:23,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1895 [2020-10-27 14:27:23,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:23,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:27:23,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:27:23,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:27:23,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:23,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:23,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:23,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:23,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:23,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:23,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:23,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:23,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:23,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:23,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:23,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:27:23,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023661837] [2020-10-27 14:27:23,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:23,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:27:23,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108462042] [2020-10-27 14:27:23,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:27:23,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:23,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:27:23,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:27:23,882 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-27 14:27:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:23,984 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2020-10-27 14:27:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:27:23,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-27 14:27:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:23,986 INFO L225 Difference]: With dead ends: 61 [2020-10-27 14:27:23,986 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 14:27:23,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:27:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 14:27:23,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-27 14:27:23,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:27:23,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-27 14:27:23,994 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 27 [2020-10-27 14:27:23,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:23,995 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-27 14:27:23,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:27:23,995 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-27 14:27:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 14:27:23,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:23,996 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:23,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:27:23,996 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:23,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1229530227, now seen corresponding path program 3 times [2020-10-27 14:27:23,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:23,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263964642] [2020-10-27 14:27:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:24,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:24,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:24,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:28,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:28,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 14:27:28,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:28,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4658 [2020-10-27 14:27:28,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:28,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:27:28,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:27:28,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:27:28,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:28,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:28,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:28,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:28,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:28,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:28,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:27:28,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:28,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:27:28,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263964642] [2020-10-27 14:27:28,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:28,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:27:28,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579520511] [2020-10-27 14:27:28,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:27:28,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:28,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:27:28,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:27:28,757 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2020-10-27 14:27:28,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:28,913 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-10-27 14:27:28,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:27:28,914 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-27 14:27:28,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:28,915 INFO L225 Difference]: With dead ends: 69 [2020-10-27 14:27:28,915 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 14:27:28,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:27:28,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 14:27:28,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-27 14:27:28,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 14:27:28,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-27 14:27:28,927 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 32 [2020-10-27 14:27:28,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:28,927 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-27 14:27:28,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:27:28,927 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-27 14:27:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:27:28,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:28,928 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:28,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:27:28,929 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:28,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:28,930 INFO L82 PathProgramCache]: Analyzing trace with hash 361097601, now seen corresponding path program 4 times [2020-10-27 14:27:28,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:28,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434681447] [2020-10-27 14:27:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:28,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:28,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:29,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:33,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:33,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:27:33,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:33,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:27:33,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:27:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:27:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:27:33,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:34,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:34,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:34,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:34,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:34,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:34,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:27:34,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:34,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:34,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:34,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:34,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:27:34,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434681447] [2020-10-27 14:27:34,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:34,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:27:34,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579305974] [2020-10-27 14:27:34,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:27:34,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:34,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:27:34,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:27:34,279 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 15 states. [2020-10-27 14:27:34,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:34,751 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2020-10-27 14:27:34,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:27:34,752 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-27 14:27:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:34,755 INFO L225 Difference]: With dead ends: 101 [2020-10-27 14:27:34,755 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 14:27:34,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:27:34,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 14:27:34,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2020-10-27 14:27:34,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 14:27:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2020-10-27 14:27:34,772 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 37 [2020-10-27 14:27:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:34,772 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2020-10-27 14:27:34,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:27:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2020-10-27 14:27:34,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:27:34,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:34,774 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:34,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:27:34,774 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:34,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:34,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1062162179, now seen corresponding path program 1 times [2020-10-27 14:27:34,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:34,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234573352] [2020-10-27 14:27:34,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:34,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:34,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:34,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:39,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:27:39,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:39,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:27:39,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:39,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:27:39,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:27:39,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:27:39,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:39,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:39,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:39,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:39,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:39,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:27:39,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:39,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:39,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:39,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:39,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:27:39,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234573352] [2020-10-27 14:27:39,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:39,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:27:39,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55199958] [2020-10-27 14:27:39,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:27:39,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:39,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:27:39,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:27:39,891 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 8 states. [2020-10-27 14:27:40,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:40,017 INFO L93 Difference]: Finished difference Result 164 states and 212 transitions. [2020-10-27 14:27:40,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:27:40,017 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-27 14:27:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:40,022 INFO L225 Difference]: With dead ends: 164 [2020-10-27 14:27:40,022 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 14:27:40,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:27:40,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 14:27:40,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-27 14:27:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 14:27:40,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2020-10-27 14:27:40,038 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 37 [2020-10-27 14:27:40,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:40,039 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2020-10-27 14:27:40,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:27:40,039 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2020-10-27 14:27:40,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 14:27:40,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:40,041 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:40,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:27:40,041 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:40,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:40,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1065120721, now seen corresponding path program 2 times [2020-10-27 14:27:40,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:40,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675476816] [2020-10-27 14:27:40,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:40,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:40,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:40,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:45,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:27:45,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:45,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:27:45,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:27:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:27:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:27:45,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:45,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:45,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:45,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:45,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:45,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:45,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:45,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:45,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:45,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:45,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-27 14:27:45,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675476816] [2020-10-27 14:27:45,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:45,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:27:45,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219842044] [2020-10-27 14:27:45,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:27:45,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:45,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:27:45,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:27:45,252 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand 13 states. [2020-10-27 14:27:45,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:45,627 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2020-10-27 14:27:45,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:27:45,627 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-27 14:27:45,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:45,629 INFO L225 Difference]: With dead ends: 119 [2020-10-27 14:27:45,629 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 14:27:45,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:27:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 14:27:45,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2020-10-27 14:27:45,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 14:27:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2020-10-27 14:27:45,657 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 42 [2020-10-27 14:27:45,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:45,657 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2020-10-27 14:27:45,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:27:45,657 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2020-10-27 14:27:45,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 14:27:45,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:45,661 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:45,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:27:45,662 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:45,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:45,662 INFO L82 PathProgramCache]: Analyzing trace with hash -523227181, now seen corresponding path program 3 times [2020-10-27 14:27:45,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:45,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824027699] [2020-10-27 14:27:45,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:45,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:50,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:27:50,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:50,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:27:50,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:50,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:27:50,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:27:50,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:27:50,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:50,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:50,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:50,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:50,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:50,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:50,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:50,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:50,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:50,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:50,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:27:50,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824027699] [2020-10-27 14:27:50,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:50,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:27:50,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039814729] [2020-10-27 14:27:50,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:27:50,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:50,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:27:50,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:27:50,777 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand 9 states. [2020-10-27 14:27:50,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:50,914 INFO L93 Difference]: Finished difference Result 180 states and 230 transitions. [2020-10-27 14:27:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:27:50,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-27 14:27:50,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:50,916 INFO L225 Difference]: With dead ends: 180 [2020-10-27 14:27:50,916 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 14:27:50,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:27:50,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 14:27:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2020-10-27 14:27:50,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 14:27:50,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2020-10-27 14:27:50,930 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 42 [2020-10-27 14:27:50,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:50,931 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2020-10-27 14:27:50,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:27:50,931 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2020-10-27 14:27:50,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:27:50,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:50,932 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:50,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:27:50,933 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:50,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:50,933 INFO L82 PathProgramCache]: Analyzing trace with hash -266522755, now seen corresponding path program 4 times [2020-10-27 14:27:50,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:50,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917565962] [2020-10-27 14:27:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:50,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:51,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:55,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:55,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:27:55,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:55,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:27:55,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:55,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:27:55,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:27:55,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:27:55,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:56,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:56,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:56,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:56,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:56,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:56,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:56,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:56,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:56,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:56,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:27:56,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917565962] [2020-10-27 14:27:56,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:56,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:27:56,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576933280] [2020-10-27 14:27:56,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:27:56,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:56,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:27:56,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:27:56,052 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand 10 states. [2020-10-27 14:27:56,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:56,194 INFO L93 Difference]: Finished difference Result 206 states and 264 transitions. [2020-10-27 14:27:56,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:27:56,195 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-27 14:27:56,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:56,196 INFO L225 Difference]: With dead ends: 206 [2020-10-27 14:27:56,196 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 14:27:56,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:27:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 14:27:56,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 115. [2020-10-27 14:27:56,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 14:27:56,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 142 transitions. [2020-10-27 14:27:56,206 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 142 transitions. Word has length 47 [2020-10-27 14:27:56,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:56,207 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 142 transitions. [2020-10-27 14:27:56,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:27:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 142 transitions. [2020-10-27 14:27:56,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:27:56,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:56,210 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:56,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:27:56,210 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:56,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:56,212 INFO L82 PathProgramCache]: Analyzing trace with hash -93604201, now seen corresponding path program 5 times [2020-10-27 14:27:56,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:56,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145931346] [2020-10-27 14:27:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:56,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:01,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:01,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:28:01,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:01,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:28:01,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:01,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:28:01,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:28:01,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:28:01,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:01,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:01,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:01,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:01,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:01,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:01,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:01,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:01,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:01,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:01,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:01,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-10-27 14:28:01,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145931346] [2020-10-27 14:28:01,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:01,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:28:01,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677022766] [2020-10-27 14:28:01,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:28:01,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:01,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:28:01,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:28:01,381 INFO L87 Difference]: Start difference. First operand 115 states and 142 transitions. Second operand 11 states. [2020-10-27 14:28:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:01,711 INFO L93 Difference]: Finished difference Result 137 states and 166 transitions. [2020-10-27 14:28:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:28:01,713 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-27 14:28:01,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:01,715 INFO L225 Difference]: With dead ends: 137 [2020-10-27 14:28:01,715 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 14:28:01,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:28:01,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 14:28:01,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 101. [2020-10-27 14:28:01,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 14:28:01,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2020-10-27 14:28:01,735 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 52 [2020-10-27 14:28:01,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:01,735 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2020-10-27 14:28:01,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:28:01,736 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2020-10-27 14:28:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:28:01,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:01,736 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:01,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:28:01,737 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:01,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:01,741 INFO L82 PathProgramCache]: Analyzing trace with hash -31564587, now seen corresponding path program 6 times [2020-10-27 14:28:01,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:01,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246732605] [2020-10-27 14:28:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:01,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:01,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:02,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:06,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:06,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:28:06,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:06,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4527 [2020-10-27 14:28:06,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:06,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:28:06,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:28:06,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:28:06,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:06,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:06,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:06,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:06,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:06,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:06,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:06,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:06,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:06,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:06,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:06,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-10-27 14:28:06,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246732605] [2020-10-27 14:28:06,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:06,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:28:06,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278577107] [2020-10-27 14:28:06,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:28:06,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:06,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:28:06,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:28:06,394 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand 9 states. [2020-10-27 14:28:06,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:06,693 INFO L93 Difference]: Finished difference Result 118 states and 141 transitions. [2020-10-27 14:28:06,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:28:06,694 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2020-10-27 14:28:06,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:06,695 INFO L225 Difference]: With dead ends: 118 [2020-10-27 14:28:06,695 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 14:28:06,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:28:06,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 14:28:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 84. [2020-10-27 14:28:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 14:28:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-10-27 14:28:06,706 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 52 [2020-10-27 14:28:06,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:06,706 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-10-27 14:28:06,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:28:06,706 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-10-27 14:28:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:28:06,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:06,707 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:06,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:28:06,708 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:06,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1519119255, now seen corresponding path program 7 times [2020-10-27 14:28:06,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:06,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478646191] [2020-10-27 14:28:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:06,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:06,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:07,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:11,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:11,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:28:11,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:11,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:28:11,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:28:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:28:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:28:11,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:11,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:11,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:11,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:11,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:11,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:11,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:28:11,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:11,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:11,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-27 14:28:11,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478646191] [2020-10-27 14:28:11,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:11,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:28:11,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376367497] [2020-10-27 14:28:11,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:28:11,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:11,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:28:11,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:28:11,822 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 11 states. [2020-10-27 14:28:11,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:11,976 INFO L93 Difference]: Finished difference Result 160 states and 198 transitions. [2020-10-27 14:28:11,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:28:11,977 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-27 14:28:11,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:11,978 INFO L225 Difference]: With dead ends: 160 [2020-10-27 14:28:11,978 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 14:28:11,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:28:11,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 14:28:11,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2020-10-27 14:28:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 14:28:11,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2020-10-27 14:28:11,992 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 52 [2020-10-27 14:28:11,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:11,992 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2020-10-27 14:28:11,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:28:11,992 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2020-10-27 14:28:11,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:28:11,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:11,993 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:11,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:28:11,993 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:11,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1699608009, now seen corresponding path program 8 times [2020-10-27 14:28:11,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:11,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497225013] [2020-10-27 14:28:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:12,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:12,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:13,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:17,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:17,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:28:17,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:17,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:28:17,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:17,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:28:17,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:28:17,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:28:17,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:17,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:17,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:17,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:17,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:17,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:17,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:17,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:17,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:17,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:17,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:17,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 14:28:17,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497225013] [2020-10-27 14:28:17,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:17,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:28:17,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30727522] [2020-10-27 14:28:17,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:28:17,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:17,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:28:17,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:28:17,138 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 12 states. [2020-10-27 14:28:17,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:17,337 INFO L93 Difference]: Finished difference Result 174 states and 216 transitions. [2020-10-27 14:28:17,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:28:17,337 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-27 14:28:17,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:17,339 INFO L225 Difference]: With dead ends: 174 [2020-10-27 14:28:17,339 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 14:28:17,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:28:17,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 14:28:17,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2020-10-27 14:28:17,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 14:28:17,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2020-10-27 14:28:17,347 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 57 [2020-10-27 14:28:17,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:17,347 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2020-10-27 14:28:17,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:28:17,347 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2020-10-27 14:28:17,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 14:28:17,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:17,348 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:17,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:28:17,349 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:17,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:17,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1404211611, now seen corresponding path program 9 times [2020-10-27 14:28:17,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:17,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109586197] [2020-10-27 14:28:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:17,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:17,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:17,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:18,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:22,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:22,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 14:28:22,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:22,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:28:22,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:28:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:28:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:28:22,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:22,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:22,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:22,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:22,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:22,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:22,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:22,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:22,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:22,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:22,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:22,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 100 proven. 17 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 14:28:22,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109586197] [2020-10-27 14:28:22,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:22,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:28:22,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521789565] [2020-10-27 14:28:22,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:28:22,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:22,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:28:22,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:28:22,880 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand 26 states. [2020-10-27 14:28:23,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:23,567 INFO L93 Difference]: Finished difference Result 382 states and 491 transitions. [2020-10-27 14:28:23,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:28:23,568 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2020-10-27 14:28:23,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:23,573 INFO L225 Difference]: With dead ends: 382 [2020-10-27 14:28:23,573 INFO L226 Difference]: Without dead ends: 378 [2020-10-27 14:28:23,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:28:23,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-27 14:28:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 198. [2020-10-27 14:28:23,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-27 14:28:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 253 transitions. [2020-10-27 14:28:23,599 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 253 transitions. Word has length 62 [2020-10-27 14:28:23,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:23,599 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 253 transitions. [2020-10-27 14:28:23,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:28:23,600 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 253 transitions. [2020-10-27 14:28:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 14:28:23,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:23,601 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:23,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:28:23,601 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:23,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:23,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2105276189, now seen corresponding path program 10 times [2020-10-27 14:28:23,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:23,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78291769] [2020-10-27 14:28:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:23,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:23,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:25,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:28,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:28,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 14:28:28,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:28,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:28:28,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:28,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:28:28,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:28:28,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:28:28,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:29,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:29,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:29,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:29,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:29,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:29,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:28:29,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:29,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:29,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:29,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:29,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 91 proven. 24 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-27 14:28:29,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78291769] [2020-10-27 14:28:29,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:29,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:28:29,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146025371] [2020-10-27 14:28:29,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:28:29,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:29,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:28:29,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:28:29,150 INFO L87 Difference]: Start difference. First operand 198 states and 253 transitions. Second operand 24 states. [2020-10-27 14:28:29,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:29,765 INFO L93 Difference]: Finished difference Result 368 states and 471 transitions. [2020-10-27 14:28:29,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:28:29,766 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-10-27 14:28:29,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:29,769 INFO L225 Difference]: With dead ends: 368 [2020-10-27 14:28:29,769 INFO L226 Difference]: Without dead ends: 364 [2020-10-27 14:28:29,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:28:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-27 14:28:29,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 193. [2020-10-27 14:28:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-27 14:28:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 246 transitions. [2020-10-27 14:28:29,787 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 246 transitions. Word has length 62 [2020-10-27 14:28:29,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:29,787 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 246 transitions. [2020-10-27 14:28:29,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:28:29,787 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 246 transitions. [2020-10-27 14:28:29,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 14:28:29,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:29,788 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:29,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:28:29,789 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:29,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:29,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1094158939, now seen corresponding path program 11 times [2020-10-27 14:28:29,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:29,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129052208] [2020-10-27 14:28:29,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:29,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:29,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:31,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:34,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:34,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 14:28:34,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:34,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:28:34,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:34,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:28:34,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:28:34,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:28:34,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:34,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:34,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:34,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:34,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:34,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:34,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:34,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:34,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:34,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:34,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:34,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 14:28:34,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129052208] [2020-10-27 14:28:34,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:34,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:28:34,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086704420] [2020-10-27 14:28:34,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:28:34,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:34,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:28:34,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:28:34,944 INFO L87 Difference]: Start difference. First operand 193 states and 246 transitions. Second operand 13 states. [2020-10-27 14:28:35,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:35,132 INFO L93 Difference]: Finished difference Result 404 states and 534 transitions. [2020-10-27 14:28:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:28:35,132 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-27 14:28:35,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:35,134 INFO L225 Difference]: With dead ends: 404 [2020-10-27 14:28:35,134 INFO L226 Difference]: Without dead ends: 236 [2020-10-27 14:28:35,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:28:35,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-27 14:28:35,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 219. [2020-10-27 14:28:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-27 14:28:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 280 transitions. [2020-10-27 14:28:35,160 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 280 transitions. Word has length 62 [2020-10-27 14:28:35,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:35,160 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 280 transitions. [2020-10-27 14:28:35,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:28:35,161 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 280 transitions. [2020-10-27 14:28:35,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:28:35,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:35,162 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:35,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:28:35,163 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:35,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:35,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1292487925, now seen corresponding path program 12 times [2020-10-27 14:28:35,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:35,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884047192] [2020-10-27 14:28:35,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:35,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:35,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:37,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:40,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:40,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:28:40,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:40,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:28:40,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:40,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:28:40,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:28:40,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:28:40,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:40,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:40,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:40,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:40,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:40,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:40,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:40,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:40,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:40,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:40,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:40,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 14:28:40,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884047192] [2020-10-27 14:28:40,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:40,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:28:40,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998776426] [2020-10-27 14:28:40,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:28:40,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:40,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:28:40,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:28:40,348 INFO L87 Difference]: Start difference. First operand 219 states and 280 transitions. Second operand 14 states. [2020-10-27 14:28:40,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:40,512 INFO L93 Difference]: Finished difference Result 454 states and 600 transitions. [2020-10-27 14:28:40,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:28:40,513 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-10-27 14:28:40,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:40,515 INFO L225 Difference]: With dead ends: 454 [2020-10-27 14:28:40,515 INFO L226 Difference]: Without dead ends: 262 [2020-10-27 14:28:40,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:28:40,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-27 14:28:40,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 245. [2020-10-27 14:28:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-27 14:28:40,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 314 transitions. [2020-10-27 14:28:40,530 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 314 transitions. Word has length 67 [2020-10-27 14:28:40,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:40,531 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 314 transitions. [2020-10-27 14:28:40,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:28:40,531 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 314 transitions. [2020-10-27 14:28:40,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 14:28:40,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:40,532 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:40,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:28:40,532 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:40,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:40,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1560232223, now seen corresponding path program 13 times [2020-10-27 14:28:40,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:40,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233823313] [2020-10-27 14:28:40,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:40,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:40,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:43,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:45,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:45,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:28:45,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:45,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:28:45,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:45,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:28:45,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:28:45,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:28:45,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:45,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:45,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:45,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:45,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:45,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:45,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:45,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:45,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:45,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:45,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:45,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 105 proven. 45 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-27 14:28:45,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233823313] [2020-10-27 14:28:45,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:45,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:28:45,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438536296] [2020-10-27 14:28:45,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:28:45,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:45,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:28:45,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:28:45,926 INFO L87 Difference]: Start difference. First operand 245 states and 314 transitions. Second operand 22 states. [2020-10-27 14:28:46,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:46,488 INFO L93 Difference]: Finished difference Result 438 states and 563 transitions. [2020-10-27 14:28:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:28:46,489 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-27 14:28:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:46,492 INFO L225 Difference]: With dead ends: 438 [2020-10-27 14:28:46,492 INFO L226 Difference]: Without dead ends: 434 [2020-10-27 14:28:46,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:28:46,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-27 14:28:46,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 231. [2020-10-27 14:28:46,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-27 14:28:46,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 295 transitions. [2020-10-27 14:28:46,511 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 295 transitions. Word has length 72 [2020-10-27 14:28:46,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:46,511 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 295 transitions. [2020-10-27 14:28:46,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:28:46,511 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 295 transitions. [2020-10-27 14:28:46,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 14:28:46,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:46,513 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:46,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:28:46,513 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:46,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:46,513 INFO L82 PathProgramCache]: Analyzing trace with hash -245206111, now seen corresponding path program 14 times [2020-10-27 14:28:46,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:46,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056907759] [2020-10-27 14:28:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:46,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:46,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:48,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:51,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:51,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:28:51,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:51,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:28:51,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:51,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:28:51,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:28:51,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:28:51,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:51,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:51,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:51,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:51,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:51,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:51,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:28:51,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:51,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:51,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:51,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:51,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 90 proven. 46 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-10-27 14:28:51,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056907759] [2020-10-27 14:28:51,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:51,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:28:51,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931885229] [2020-10-27 14:28:51,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:28:51,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:51,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:28:51,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:28:51,842 INFO L87 Difference]: Start difference. First operand 231 states and 295 transitions. Second operand 20 states. [2020-10-27 14:28:52,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:52,374 INFO L93 Difference]: Finished difference Result 402 states and 515 transitions. [2020-10-27 14:28:52,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:28:52,375 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2020-10-27 14:28:52,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:52,378 INFO L225 Difference]: With dead ends: 402 [2020-10-27 14:28:52,378 INFO L226 Difference]: Without dead ends: 398 [2020-10-27 14:28:52,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:28:52,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-27 14:28:52,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 214. [2020-10-27 14:28:52,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-27 14:28:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 272 transitions. [2020-10-27 14:28:52,404 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 272 transitions. Word has length 72 [2020-10-27 14:28:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:52,405 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 272 transitions. [2020-10-27 14:28:52,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:28:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 272 transitions. [2020-10-27 14:28:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 14:28:52,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:52,406 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:52,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:28:52,406 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:52,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:52,407 INFO L82 PathProgramCache]: Analyzing trace with hash -183166497, now seen corresponding path program 15 times [2020-10-27 14:28:52,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:52,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915426975] [2020-10-27 14:28:52,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:52,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:52,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:54,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:57,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:57,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:28:57,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:57,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:28:57,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:57,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:28:57,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:28:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:28:57,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:57,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:57,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:57,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:57,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:57,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:57,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:57,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:57,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:57,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:57,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:57,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-27 14:28:57,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915426975] [2020-10-27 14:28:57,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:57,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:28:57,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298769292] [2020-10-27 14:28:57,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:28:57,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:57,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:28:57,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:28:57,589 INFO L87 Difference]: Start difference. First operand 214 states and 272 transitions. Second operand 15 states. [2020-10-27 14:28:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:57,812 INFO L93 Difference]: Finished difference Result 432 states and 566 transitions. [2020-10-27 14:28:57,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:28:57,812 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 72 [2020-10-27 14:28:57,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:57,814 INFO L225 Difference]: With dead ends: 432 [2020-10-27 14:28:57,814 INFO L226 Difference]: Without dead ends: 247 [2020-10-27 14:28:57,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:28:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-27 14:28:57,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 234. [2020-10-27 14:28:57,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 14:28:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 298 transitions. [2020-10-27 14:28:57,829 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 298 transitions. Word has length 72 [2020-10-27 14:28:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:57,829 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 298 transitions. [2020-10-27 14:28:57,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:28:57,830 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 298 transitions. [2020-10-27 14:28:57,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:28:57,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:57,831 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:57,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:28:57,831 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:57,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:57,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1016176271, now seen corresponding path program 16 times [2020-10-27 14:28:57,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:57,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761885692] [2020-10-27 14:28:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:57,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:57,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:01,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:02,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:02,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 14:29:02,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:02,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:29:02,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:02,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:29:02,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:29:02,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 14:29:02,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:03,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:03,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:03,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:03,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:03,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:03,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:29:03,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:03,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:03,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:03,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:03,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 82 proven. 51 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-10-27 14:29:03,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761885692] [2020-10-27 14:29:03,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:03,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:29:03,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895896745] [2020-10-27 14:29:03,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:29:03,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:03,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:29:03,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:29:03,123 INFO L87 Difference]: Start difference. First operand 234 states and 298 transitions. Second operand 18 states. [2020-10-27 14:29:03,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:03,575 INFO L93 Difference]: Finished difference Result 392 states and 501 transitions. [2020-10-27 14:29:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:29:03,576 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2020-10-27 14:29:03,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:03,579 INFO L225 Difference]: With dead ends: 392 [2020-10-27 14:29:03,579 INFO L226 Difference]: Without dead ends: 388 [2020-10-27 14:29:03,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:29:03,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-27 14:29:03,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 211. [2020-10-27 14:29:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-27 14:29:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 267 transitions. [2020-10-27 14:29:03,594 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 267 transitions. Word has length 77 [2020-10-27 14:29:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:03,594 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 267 transitions. [2020-10-27 14:29:03,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:29:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 267 transitions. [2020-10-27 14:29:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:29:03,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:03,596 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:03,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:29:03,596 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:03,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:03,596 INFO L82 PathProgramCache]: Analyzing trace with hash -741416657, now seen corresponding path program 17 times [2020-10-27 14:29:03,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:03,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280589528] [2020-10-27 14:29:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:03,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:03,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:06,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:08,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:08,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 14:29:08,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:08,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:29:08,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:08,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:29:08,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:29:08,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:29:08,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:08,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:08,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:08,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:08,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:08,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:08,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:08,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:08,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:08,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:08,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:08,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-27 14:29:08,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280589528] [2020-10-27 14:29:08,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:08,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:29:08,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757474829] [2020-10-27 14:29:08,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:29:08,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:08,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:29:08,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:29:08,786 INFO L87 Difference]: Start difference. First operand 211 states and 267 transitions. Second operand 16 states. [2020-10-27 14:29:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:09,028 INFO L93 Difference]: Finished difference Result 419 states and 546 transitions. [2020-10-27 14:29:09,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:29:09,028 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2020-10-27 14:29:09,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:09,030 INFO L225 Difference]: With dead ends: 419 [2020-10-27 14:29:09,030 INFO L226 Difference]: Without dead ends: 239 [2020-10-27 14:29:09,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:29:09,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-27 14:29:09,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 228. [2020-10-27 14:29:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-27 14:29:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 289 transitions. [2020-10-27 14:29:09,046 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 289 transitions. Word has length 77 [2020-10-27 14:29:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:09,047 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 289 transitions. [2020-10-27 14:29:09,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:29:09,047 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 289 transitions. [2020-10-27 14:29:09,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 14:29:09,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:09,052 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:09,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:29:09,052 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:09,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:09,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1038804955, now seen corresponding path program 18 times [2020-10-27 14:29:09,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:09,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977262902] [2020-10-27 14:29:09,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:09,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:09,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:13,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:14,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:14,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 14:29:14,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:14,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:29:14,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:14,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:29:14,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:29:14,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:29:14,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:14,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:14,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:14,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:14,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:14,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:14,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:14,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:14,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:14,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:14,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:14,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 69 proven. 52 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2020-10-27 14:29:14,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977262902] [2020-10-27 14:29:14,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:14,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:29:14,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375925261] [2020-10-27 14:29:14,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:29:14,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:14,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:29:14,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:29:14,319 INFO L87 Difference]: Start difference. First operand 228 states and 289 transitions. Second operand 16 states. [2020-10-27 14:29:14,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:14,732 INFO L93 Difference]: Finished difference Result 364 states and 463 transitions. [2020-10-27 14:29:14,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:29:14,733 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 82 [2020-10-27 14:29:14,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:14,739 INFO L225 Difference]: With dead ends: 364 [2020-10-27 14:29:14,739 INFO L226 Difference]: Without dead ends: 360 [2020-10-27 14:29:14,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:29:14,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-27 14:29:14,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 199. [2020-10-27 14:29:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-27 14:29:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 250 transitions. [2020-10-27 14:29:14,756 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 250 transitions. Word has length 82 [2020-10-27 14:29:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:14,756 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 250 transitions. [2020-10-27 14:29:14,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:29:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 250 transitions. [2020-10-27 14:29:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 14:29:14,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:14,757 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:14,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:29:14,759 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:14,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:14,760 INFO L82 PathProgramCache]: Analyzing trace with hash -2068164253, now seen corresponding path program 19 times [2020-10-27 14:29:14,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:14,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278709233] [2020-10-27 14:29:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:14,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:14,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:18,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:19,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:19,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 14:29:19,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:19,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:29:19,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:19,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:29:19,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:29:19,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:29:19,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:19,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:19,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:19,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:19,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:19,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:19,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:19,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:19,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:19,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:19,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:19,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-27 14:29:19,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278709233] [2020-10-27 14:29:19,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:19,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:29:19,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554035403] [2020-10-27 14:29:19,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:29:19,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:19,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:29:19,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:29:19,983 INFO L87 Difference]: Start difference. First operand 199 states and 250 transitions. Second operand 17 states. [2020-10-27 14:29:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:20,203 INFO L93 Difference]: Finished difference Result 388 states and 502 transitions. [2020-10-27 14:29:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:29:20,204 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-10-27 14:29:20,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:20,205 INFO L225 Difference]: With dead ends: 388 [2020-10-27 14:29:20,206 INFO L226 Difference]: Without dead ends: 222 [2020-10-27 14:29:20,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:29:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-27 14:29:20,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 213. [2020-10-27 14:29:20,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-27 14:29:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 268 transitions. [2020-10-27 14:29:20,226 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 268 transitions. Word has length 82 [2020-10-27 14:29:20,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:20,226 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 268 transitions. [2020-10-27 14:29:20,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:29:20,226 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 268 transitions. [2020-10-27 14:29:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:29:20,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:20,228 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:20,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:29:20,228 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:20,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:20,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2032741869, now seen corresponding path program 20 times [2020-10-27 14:29:20,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:20,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559146683] [2020-10-27 14:29:20,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:20,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:20,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:24,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:25,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:25,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:29:25,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:25,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 14:29:25,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:25,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:29:25,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:29:25,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 14:29:25,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:25,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:25,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:25,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:25,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:25,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:25,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:29:25,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:25,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:25,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:25,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:25,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 51 proven. 49 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2020-10-27 14:29:25,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559146683] [2020-10-27 14:29:25,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:25,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:29:25,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59511503] [2020-10-27 14:29:25,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:29:25,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:25,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:29:25,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:29:25,463 INFO L87 Difference]: Start difference. First operand 213 states and 268 transitions. Second operand 14 states. [2020-10-27 14:29:25,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:25,868 INFO L93 Difference]: Finished difference Result 318 states and 401 transitions. [2020-10-27 14:29:25,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:29:25,869 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 87 [2020-10-27 14:29:25,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:25,872 INFO L225 Difference]: With dead ends: 318 [2020-10-27 14:29:25,872 INFO L226 Difference]: Without dead ends: 314 [2020-10-27 14:29:25,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:29:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-27 14:29:25,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 178. [2020-10-27 14:29:25,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-27 14:29:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 221 transitions. [2020-10-27 14:29:25,887 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 221 transitions. Word has length 87 [2020-10-27 14:29:25,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:25,887 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 221 transitions. [2020-10-27 14:29:25,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:29:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 221 transitions. [2020-10-27 14:29:25,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:29:25,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:25,889 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:25,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:29:25,889 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:25,889 INFO L82 PathProgramCache]: Analyzing trace with hash -16645973, now seen corresponding path program 21 times [2020-10-27 14:29:25,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:25,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127780233] [2020-10-27 14:29:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:25,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:25,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:30,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:30,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:30,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:29:30,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:30,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:29:30,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:30,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:29:30,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:29:30,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 14:29:30,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:31,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:31,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:31,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:31,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:31,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:31,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:31,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:31,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:31,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:31,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:31,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2020-10-27 14:29:31,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127780233] [2020-10-27 14:29:31,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:31,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:29:31,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702861509] [2020-10-27 14:29:31,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:29:31,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:31,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:29:31,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:29:31,052 INFO L87 Difference]: Start difference. First operand 178 states and 221 transitions. Second operand 12 states. [2020-10-27 14:29:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:31,406 INFO L93 Difference]: Finished difference Result 240 states and 297 transitions. [2020-10-27 14:29:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:29:31,407 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-10-27 14:29:31,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:31,409 INFO L225 Difference]: With dead ends: 240 [2020-10-27 14:29:31,409 INFO L226 Difference]: Without dead ends: 236 [2020-10-27 14:29:31,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:29:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-27 14:29:31,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 140. [2020-10-27 14:29:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 14:29:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 170 transitions. [2020-10-27 14:29:31,424 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 170 transitions. Word has length 87 [2020-10-27 14:29:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:31,425 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 170 transitions. [2020-10-27 14:29:31,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:29:31,425 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 170 transitions. [2020-10-27 14:29:31,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:29:31,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:31,426 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:31,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:29:31,426 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:31,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:31,426 INFO L82 PathProgramCache]: Analyzing trace with hash -369734355, now seen corresponding path program 1 times [2020-10-27 14:29:31,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:31,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577022090] [2020-10-27 14:29:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:31,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:31,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:35,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:36,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:36,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:29:36,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:36,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:29:36,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:36,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:29:36,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:29:36,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 14:29:36,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:36,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:36,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:36,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:36,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:36,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:36,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:36,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:36,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:36,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:36,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:36,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:36,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2020-10-27 14:29:36,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577022090] [2020-10-27 14:29:36,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:36,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:29:36,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739153584] [2020-10-27 14:29:36,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:29:36,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:36,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:29:36,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:29:36,566 INFO L87 Difference]: Start difference. First operand 140 states and 170 transitions. Second operand 10 states. [2020-10-27 14:29:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:36,879 INFO L93 Difference]: Finished difference Result 201 states and 245 transitions. [2020-10-27 14:29:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:29:36,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2020-10-27 14:29:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:36,881 INFO L225 Difference]: With dead ends: 201 [2020-10-27 14:29:36,881 INFO L226 Difference]: Without dead ends: 197 [2020-10-27 14:29:36,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:29:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-27 14:29:36,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 98. [2020-10-27 14:29:36,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 14:29:36,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2020-10-27 14:29:36,893 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 87 [2020-10-27 14:29:36,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:36,893 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2020-10-27 14:29:36,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:29:36,893 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2020-10-27 14:29:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 14:29:36,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:36,894 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:36,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:29:36,895 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:36,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:36,895 INFO L82 PathProgramCache]: Analyzing trace with hash 156576839, now seen corresponding path program 1 times [2020-10-27 14:29:36,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:36,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673502213] [2020-10-27 14:29:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:36,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:36,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:41,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:41,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 14:29:41,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:29:41,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:29:41,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:41,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:29:41,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:29:41,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:29:41,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:42,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:42,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:42,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:42,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:42,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:42,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:42,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:42,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:42,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:42,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:42,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:42,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-27 14:29:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:42,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:42,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:42,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:42,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:42,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:42,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:42,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:42,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:42,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:42,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 2 proven. 287 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-27 14:29:42,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673502213] [2020-10-27 14:29:42,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:42,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:29:42,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053842570] [2020-10-27 14:29:42,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:29:42,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:42,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:29:42,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:29:42,125 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand 18 states. [2020-10-27 14:29:42,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:42,363 INFO L93 Difference]: Finished difference Result 169 states and 204 transitions. [2020-10-27 14:29:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:29:42,364 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-10-27 14:29:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:42,365 INFO L225 Difference]: With dead ends: 169 [2020-10-27 14:29:42,366 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 14:29:42,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:29:42,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 14:29:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-10-27 14:29:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 14:29:42,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2020-10-27 14:29:42,377 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 95 [2020-10-27 14:29:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:42,378 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2020-10-27 14:29:42,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:29:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2020-10-27 14:29:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 14:29:42,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:42,381 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:42,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:29:42,381 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:42,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:42,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1628130049, now seen corresponding path program 2 times [2020-10-27 14:29:42,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:42,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536075692] [2020-10-27 14:29:42,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:42,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:42,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:47,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:47,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 14:29:47,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:29:47,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:29:47,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:47,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:29:47,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:29:47,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:29:47,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:47,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:47,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:47,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:47,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:47,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:47,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:47,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:47,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:47,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:47,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:47,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:47,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-27 14:29:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:47,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:47,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:47,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:47,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:47,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:29:47,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:47,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:47,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:47,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:47,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 2 proven. 330 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2020-10-27 14:29:47,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536075692] [2020-10-27 14:29:47,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:47,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:29:47,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056957101] [2020-10-27 14:29:47,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:29:47,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:47,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:29:47,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:29:47,636 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand 19 states. [2020-10-27 14:29:47,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:47,880 INFO L93 Difference]: Finished difference Result 177 states and 214 transitions. [2020-10-27 14:29:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:29:47,881 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 100 [2020-10-27 14:29:47,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:47,882 INFO L225 Difference]: With dead ends: 177 [2020-10-27 14:29:47,882 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 14:29:47,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:29:47,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 14:29:47,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-10-27 14:29:47,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 14:29:47,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2020-10-27 14:29:47,894 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 100 [2020-10-27 14:29:47,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:47,895 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2020-10-27 14:29:47,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:29:47,895 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2020-10-27 14:29:47,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 14:29:47,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:47,896 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:47,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:29:47,897 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:47,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:47,897 INFO L82 PathProgramCache]: Analyzing trace with hash 999066819, now seen corresponding path program 3 times [2020-10-27 14:29:47,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:47,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933007177] [2020-10-27 14:29:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:47,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:47,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:52,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:52,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 14:29:52,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:29:52,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:29:52,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:52,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:29:52,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:29:52,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:29:52,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:53,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:53,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:53,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:53,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:53,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:53,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:53,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:53,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:53,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:53,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:53,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:53,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 14:29:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:53,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:53,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:53,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:53,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:53,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:53,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:53,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:53,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:53,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:53,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 2 proven. 376 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2020-10-27 14:29:53,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933007177] [2020-10-27 14:29:53,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:53,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:29:53,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585608460] [2020-10-27 14:29:53,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:29:53,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:53,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:29:53,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:29:53,175 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand 20 states. [2020-10-27 14:29:53,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:53,456 INFO L93 Difference]: Finished difference Result 185 states and 224 transitions. [2020-10-27 14:29:53,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:29:53,457 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2020-10-27 14:29:53,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:53,458 INFO L225 Difference]: With dead ends: 185 [2020-10-27 14:29:53,458 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 14:29:53,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:29:53,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 14:29:53,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2020-10-27 14:29:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 14:29:53,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 132 transitions. [2020-10-27 14:29:53,476 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 132 transitions. Word has length 105 [2020-10-27 14:29:53,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:53,477 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 132 transitions. [2020-10-27 14:29:53,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:29:53,477 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 132 transitions. [2020-10-27 14:29:53,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 14:29:53,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:53,486 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:53,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:29:53,487 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:53,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1928363901, now seen corresponding path program 4 times [2020-10-27 14:29:53,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:53,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965816020] [2020-10-27 14:29:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:53,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:53,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:58,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:58,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 14:29:58,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:29:58,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-27 14:29:58,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:58,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:29:58,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:29:58,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 14:29:58,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:58,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:58,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:58,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:58,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:58,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:58,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:29:58,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:58,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:58,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-27 14:29:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:58,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:58,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:58,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:58,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:58,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:29:58,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:58,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:58,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:58,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:58,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 2 proven. 425 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-10-27 14:29:58,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965816020] [2020-10-27 14:29:58,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:58,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:29:58,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046487207] [2020-10-27 14:29:58,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:29:58,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:58,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:29:58,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:29:58,817 INFO L87 Difference]: Start difference. First operand 113 states and 132 transitions. Second operand 21 states. [2020-10-27 14:29:59,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:59,110 INFO L93 Difference]: Finished difference Result 193 states and 234 transitions. [2020-10-27 14:29:59,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:29:59,110 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2020-10-27 14:29:59,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:59,111 INFO L225 Difference]: With dead ends: 193 [2020-10-27 14:29:59,112 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 14:29:59,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:29:59,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 14:29:59,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2020-10-27 14:29:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 14:29:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 138 transitions. [2020-10-27 14:29:59,124 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 138 transitions. Word has length 110 [2020-10-27 14:29:59,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:59,125 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 138 transitions. [2020-10-27 14:29:59,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:29:59,125 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 138 transitions. [2020-10-27 14:29:59,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 14:29:59,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:59,126 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:59,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:29:59,127 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:59,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:59,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1357153599, now seen corresponding path program 5 times [2020-10-27 14:29:59,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:59,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680756280] [2020-10-27 14:29:59,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:59,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:59,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:04,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:04,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 14:30:04,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:30:04,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:30:04,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:04,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:30:04,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 14:30:04,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:30:04,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:04,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:04,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:04,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:04,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:04,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:04,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:04,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:04,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:04,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:04,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:04,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:04,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-27 14:30:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:04,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:04,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:04,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:04,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:04,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:30:04,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:04,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:04,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:30:04,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:04,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 2 proven. 477 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2020-10-27 14:30:04,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680756280] [2020-10-27 14:30:04,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:04,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:30:04,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180228262] [2020-10-27 14:30:04,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:30:04,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:04,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:30:04,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:30:04,475 INFO L87 Difference]: Start difference. First operand 118 states and 138 transitions. Second operand 22 states. [2020-10-27 14:30:04,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:04,720 INFO L93 Difference]: Finished difference Result 201 states and 244 transitions. [2020-10-27 14:30:04,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:30:04,721 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-10-27 14:30:04,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:04,722 INFO L225 Difference]: With dead ends: 201 [2020-10-27 14:30:04,722 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:30:04,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:30:04,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:30:04,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2020-10-27 14:30:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 14:30:04,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 144 transitions. [2020-10-27 14:30:04,735 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 144 transitions. Word has length 115 [2020-10-27 14:30:04,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:04,735 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 144 transitions. [2020-10-27 14:30:04,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:30:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 144 transitions. [2020-10-27 14:30:04,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 14:30:04,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:04,737 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:04,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:30:04,737 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:04,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:04,737 INFO L82 PathProgramCache]: Analyzing trace with hash 408933383, now seen corresponding path program 6 times [2020-10-27 14:30:04,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:04,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786160727] [2020-10-27 14:30:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:04,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:04,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:09,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:09,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 14:30:09,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:30:09,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:30:09,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:09,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:30:09,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 14:30:09,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 14:30:09,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:10,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:10,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:10,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:10,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:10,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:10,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:30:10,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:10,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:10,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:10,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:10,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:10,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-27 14:30:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:10,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:10,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:10,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:10,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:10,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:30:10,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:10,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:10,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:30:10,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:10,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 2 proven. 532 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-27 14:30:10,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786160727] [2020-10-27 14:30:10,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:10,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:30:10,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925854125] [2020-10-27 14:30:10,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:30:10,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:10,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:30:10,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:30:10,071 INFO L87 Difference]: Start difference. First operand 123 states and 144 transitions. Second operand 23 states. [2020-10-27 14:30:10,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:10,349 INFO L93 Difference]: Finished difference Result 209 states and 254 transitions. [2020-10-27 14:30:10,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:30:10,350 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 120 [2020-10-27 14:30:10,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:10,351 INFO L225 Difference]: With dead ends: 209 [2020-10-27 14:30:10,351 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 14:30:10,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:30:10,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 14:30:10,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2020-10-27 14:30:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 14:30:10,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2020-10-27 14:30:10,365 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 120 [2020-10-27 14:30:10,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:10,365 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2020-10-27 14:30:10,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:30:10,366 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2020-10-27 14:30:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 14:30:10,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:10,367 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:10,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:30:10,367 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:10,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:10,367 INFO L82 PathProgramCache]: Analyzing trace with hash 145806779, now seen corresponding path program 7 times [2020-10-27 14:30:10,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:10,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953352378] [2020-10-27 14:30:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:10,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:10,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:15,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:15,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 14:30:15,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:30:15,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 14:30:15,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:15,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:30:15,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:30:15,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:30:15,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:15,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:15,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:15,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:15,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:15,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:15,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:30:15,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:15,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:15,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:15,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:15,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:15,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-27 14:30:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:15,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:15,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:15,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:15,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:15,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:30:15,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:15,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:15,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:30:15,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:15,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 2 proven. 590 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2020-10-27 14:30:15,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953352378] [2020-10-27 14:30:15,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:15,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:30:15,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778754157] [2020-10-27 14:30:15,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:30:15,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:15,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:30:15,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:30:15,856 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand 24 states. [2020-10-27 14:30:16,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:16,152 INFO L93 Difference]: Finished difference Result 217 states and 264 transitions. [2020-10-27 14:30:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:30:16,152 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 125 [2020-10-27 14:30:16,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:16,154 INFO L225 Difference]: With dead ends: 217 [2020-10-27 14:30:16,154 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 14:30:16,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:30:16,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 14:30:16,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2020-10-27 14:30:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 14:30:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 156 transitions. [2020-10-27 14:30:16,168 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 156 transitions. Word has length 125 [2020-10-27 14:30:16,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:16,169 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 156 transitions. [2020-10-27 14:30:16,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:30:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 156 transitions. [2020-10-27 14:30:16,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-27 14:30:16,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:16,170 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:16,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:30:16,170 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:16,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:16,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1575882869, now seen corresponding path program 8 times [2020-10-27 14:30:16,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:16,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429412849] [2020-10-27 14:30:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:16,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:16,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:21,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:21,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 14:30:21,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:30:21,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 14:30:21,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:21,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:30:21,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 14:30:21,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 14:30:21,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:21,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:21,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:21,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:21,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:21,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:21,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:30:21,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:21,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:21,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:21,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:21,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:21,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-10-27 14:30:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:21,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:21,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:21,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:21,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:21,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:30:21,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:21,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:21,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:30:21,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:21,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 2 proven. 651 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2020-10-27 14:30:21,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429412849] [2020-10-27 14:30:21,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:21,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:30:21,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557656350] [2020-10-27 14:30:21,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:30:21,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:21,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:30:21,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:30:21,664 INFO L87 Difference]: Start difference. First operand 133 states and 156 transitions. Second operand 25 states. [2020-10-27 14:30:21,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:21,943 INFO L93 Difference]: Finished difference Result 225 states and 274 transitions. [2020-10-27 14:30:21,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:30:21,943 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 130 [2020-10-27 14:30:21,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:21,945 INFO L225 Difference]: With dead ends: 225 [2020-10-27 14:30:21,945 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 14:30:21,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:30:21,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 14:30:21,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2020-10-27 14:30:21,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 14:30:21,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 162 transitions. [2020-10-27 14:30:21,960 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 162 transitions. Word has length 130 [2020-10-27 14:30:21,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:21,961 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 162 transitions. [2020-10-27 14:30:21,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:30:21,961 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 162 transitions. [2020-10-27 14:30:21,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 14:30:21,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:21,962 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:21,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:30:21,962 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:21,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:21,963 INFO L82 PathProgramCache]: Analyzing trace with hash 541408823, now seen corresponding path program 9 times [2020-10-27 14:30:21,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:21,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317324837] [2020-10-27 14:30:21,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:22,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:22,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:27,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:27,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 14:30:27,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:30:27,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 14:30:27,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:27,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:30:27,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 14:30:27,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 14:30:27,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:27,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:27,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:27,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:27,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:27,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:27,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:27,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:27,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:27,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:27,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:27,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:27,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-27 14:30:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:27,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:27,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:27,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:27,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:27,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:30:27,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:27,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:27,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:30:27,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:27,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 2 proven. 715 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-10-27 14:30:27,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317324837] [2020-10-27 14:30:27,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:27,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:30:27,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659637469] [2020-10-27 14:30:27,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:30:27,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:27,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:30:27,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:30:27,423 INFO L87 Difference]: Start difference. First operand 138 states and 162 transitions. Second operand 26 states. [2020-10-27 14:30:27,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:27,702 INFO L93 Difference]: Finished difference Result 233 states and 284 transitions. [2020-10-27 14:30:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:30:27,702 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 135 [2020-10-27 14:30:27,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:27,704 INFO L225 Difference]: With dead ends: 233 [2020-10-27 14:30:27,704 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 14:30:27,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:30:27,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 14:30:27,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2020-10-27 14:30:27,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 14:30:27,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2020-10-27 14:30:27,720 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 135 [2020-10-27 14:30:27,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:27,720 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2020-10-27 14:30:27,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:30:27,720 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2020-10-27 14:30:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-27 14:30:27,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:27,721 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:27,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:30:27,721 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:27,722 INFO L82 PathProgramCache]: Analyzing trace with hash 257037071, now seen corresponding path program 10 times [2020-10-27 14:30:27,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:27,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560641811] [2020-10-27 14:30:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:27,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:27,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:32,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:32,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-27 14:30:32,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:30:32,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 14:30:32,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:30:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 14:30:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 14:30:32,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:33,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:33,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:33,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:33,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:33,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:33,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:33,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:33,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:33,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:33,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:33,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:33,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-10-27 14:30:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:33,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:33,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:33,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:33,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:33,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:30:33,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:33,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:33,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:30:33,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:33,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1315 backedges. 2 proven. 782 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2020-10-27 14:30:33,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560641811] [2020-10-27 14:30:33,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:33,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:30:33,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135929275] [2020-10-27 14:30:33,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:30:33,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:33,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:30:33,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:30:33,237 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand 27 states. [2020-10-27 14:30:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:33,588 INFO L93 Difference]: Finished difference Result 241 states and 294 transitions. [2020-10-27 14:30:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:30:33,589 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 140 [2020-10-27 14:30:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:33,590 INFO L225 Difference]: With dead ends: 241 [2020-10-27 14:30:33,590 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 14:30:33,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:30:33,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 14:30:33,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2020-10-27 14:30:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-27 14:30:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 174 transitions. [2020-10-27 14:30:33,606 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 174 transitions. Word has length 140 [2020-10-27 14:30:33,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:33,606 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 174 transitions. [2020-10-27 14:30:33,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:30:33,606 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 174 transitions. [2020-10-27 14:30:33,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 14:30:33,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:33,607 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:33,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:30:33,608 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:33,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:33,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1324711603, now seen corresponding path program 11 times [2020-10-27 14:30:33,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:33,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733438300] [2020-10-27 14:30:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:33,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:33,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:38,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:38,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-27 14:30:38,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:30:38,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 14:30:38,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:38,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:30:38,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:30:38,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 14:30:38,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:39,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:39,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:39,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:39,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:39,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:39,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:30:39,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:39,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:39,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:39,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:39,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:39,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-27 14:30:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:39,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:39,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:39,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:39,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:39,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:30:39,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:39,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:39,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:30:39,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:39,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 2 proven. 852 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-10-27 14:30:39,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733438300] [2020-10-27 14:30:39,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:39,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:30:39,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723351881] [2020-10-27 14:30:39,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:30:39,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:39,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:30:39,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:30:39,125 INFO L87 Difference]: Start difference. First operand 148 states and 174 transitions. Second operand 28 states. [2020-10-27 14:30:39,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:39,407 INFO L93 Difference]: Finished difference Result 249 states and 304 transitions. [2020-10-27 14:30:39,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:30:39,407 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 145 [2020-10-27 14:30:39,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:39,408 INFO L225 Difference]: With dead ends: 249 [2020-10-27 14:30:39,409 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 14:30:39,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:30:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 14:30:39,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-10-27 14:30:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 14:30:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 180 transitions. [2020-10-27 14:30:39,424 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 180 transitions. Word has length 145 [2020-10-27 14:30:39,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:39,424 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 180 transitions. [2020-10-27 14:30:39,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:30:39,424 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 180 transitions. [2020-10-27 14:30:39,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-27 14:30:39,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:39,425 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:39,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 14:30:39,425 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:39,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:39,426 INFO L82 PathProgramCache]: Analyzing trace with hash -850624877, now seen corresponding path program 12 times [2020-10-27 14:30:39,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:39,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804869056] [2020-10-27 14:30:39,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:39,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:39,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:44,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:44,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-27 14:30:44,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:30:44,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 14:30:44,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:44,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:30:44,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 14:30:44,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 14:30:44,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:44,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:44,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:44,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:44,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:44,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:44,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:30:44,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:44,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:44,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:44,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:44,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:44,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-10-27 14:30:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:44,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:44,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:44,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:44,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:44,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:30:44,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:44,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:44,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:30:44,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:44,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 2 proven. 925 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2020-10-27 14:30:45,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804869056] [2020-10-27 14:30:45,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:45,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:30:45,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603234337] [2020-10-27 14:30:45,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:30:45,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:45,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:30:45,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:30:45,008 INFO L87 Difference]: Start difference. First operand 153 states and 180 transitions. Second operand 29 states. [2020-10-27 14:30:45,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:45,413 INFO L93 Difference]: Finished difference Result 257 states and 314 transitions. [2020-10-27 14:30:45,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:30:45,414 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 150 [2020-10-27 14:30:45,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:45,415 INFO L225 Difference]: With dead ends: 257 [2020-10-27 14:30:45,415 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 14:30:45,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:30:45,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 14:30:45,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2020-10-27 14:30:45,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 14:30:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2020-10-27 14:30:45,429 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 150 [2020-10-27 14:30:45,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:45,430 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2020-10-27 14:30:45,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:30:45,430 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2020-10-27 14:30:45,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 14:30:45,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:45,431 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:45,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 14:30:45,431 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:45,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:45,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1108694831, now seen corresponding path program 13 times [2020-10-27 14:30:45,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:45,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688954050] [2020-10-27 14:30:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:45,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:45,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:50,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:50,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 14:30:50,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:30:50,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-27 14:30:50,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:50,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:30:50,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 14:30:50,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 14:30:50,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:51,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:51,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:51,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:51,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:51,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:51,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:30:51,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:51,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:51,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-10-27 14:30:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:51,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:51,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:51,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:51,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:51,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:30:51,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:51,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:51,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:30:51,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:51,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 2 proven. 1001 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2020-10-27 14:30:51,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688954050] [2020-10-27 14:30:51,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:51,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:30:51,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148029809] [2020-10-27 14:30:51,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:30:51,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:51,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:30:51,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:30:51,075 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand 30 states. [2020-10-27 14:30:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:51,386 INFO L93 Difference]: Finished difference Result 265 states and 324 transitions. [2020-10-27 14:30:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:30:51,386 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 155 [2020-10-27 14:30:51,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:51,388 INFO L225 Difference]: With dead ends: 265 [2020-10-27 14:30:51,388 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 14:30:51,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:30:51,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 14:30:51,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2020-10-27 14:30:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 14:30:51,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 192 transitions. [2020-10-27 14:30:51,405 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 192 transitions. Word has length 155 [2020-10-27 14:30:51,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:51,406 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 192 transitions. [2020-10-27 14:30:51,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:30:51,406 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 192 transitions. [2020-10-27 14:30:51,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-27 14:30:51,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:51,407 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:51,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 14:30:51,407 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:51,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:51,408 INFO L82 PathProgramCache]: Analyzing trace with hash -718441961, now seen corresponding path program 14 times [2020-10-27 14:30:51,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:51,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681301829] [2020-10-27 14:30:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:51,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:51,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:56,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:56,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-27 14:30:56,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:30:56,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-27 14:30:56,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:56,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:30:56,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 14:30:56,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 14:30:56,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:56,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:56,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:56,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:56,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:56,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:56,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:56,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:56,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:56,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:56,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:56,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:56,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-10-27 14:30:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:56,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:56,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:56,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:56,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:56,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:30:56,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:56,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:56,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:30:56,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:56,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1813 backedges. 2 proven. 1080 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2020-10-27 14:30:57,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681301829] [2020-10-27 14:30:57,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:57,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:30:57,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883873869] [2020-10-27 14:30:57,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:30:57,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:57,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:30:57,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:30:57,027 INFO L87 Difference]: Start difference. First operand 163 states and 192 transitions. Second operand 31 states. [2020-10-27 14:30:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:57,461 INFO L93 Difference]: Finished difference Result 273 states and 334 transitions. [2020-10-27 14:30:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:30:57,462 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 160 [2020-10-27 14:30:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:57,463 INFO L225 Difference]: With dead ends: 273 [2020-10-27 14:30:57,463 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 14:30:57,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:30:57,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 14:30:57,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2020-10-27 14:30:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 14:30:57,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 198 transitions. [2020-10-27 14:30:57,480 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 198 transitions. Word has length 160 [2020-10-27 14:30:57,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:57,481 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 198 transitions. [2020-10-27 14:30:57,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:30:57,481 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 198 transitions. [2020-10-27 14:30:57,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 14:30:57,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:57,482 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:57,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 14:30:57,482 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:57,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:57,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1728542805, now seen corresponding path program 15 times [2020-10-27 14:30:57,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:57,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561961587] [2020-10-27 14:30:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:57,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:57,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:02,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:02,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 14:31:02,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:31:02,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 14:31:02,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:02,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:31:02,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 14:31:02,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 14:31:02,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:03,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:03,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:03,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:03,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:03,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:03,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:03,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:03,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:03,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:03,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:03,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:03,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-10-27 14:31:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:03,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:03,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:03,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:31:03,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:03,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:31:03,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:31:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:03,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 2 proven. 1162 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-10-27 14:31:03,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561961587] [2020-10-27 14:31:03,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:03,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:31:03,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705820167] [2020-10-27 14:31:03,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:31:03,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:03,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:31:03,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:31:03,134 INFO L87 Difference]: Start difference. First operand 168 states and 198 transitions. Second operand 32 states. [2020-10-27 14:31:03,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:03,518 INFO L93 Difference]: Finished difference Result 281 states and 344 transitions. [2020-10-27 14:31:03,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:31:03,518 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 165 [2020-10-27 14:31:03,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:03,520 INFO L225 Difference]: With dead ends: 281 [2020-10-27 14:31:03,520 INFO L226 Difference]: Without dead ends: 176 [2020-10-27 14:31:03,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:31:03,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-27 14:31:03,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2020-10-27 14:31:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-27 14:31:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2020-10-27 14:31:03,533 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 165 [2020-10-27 14:31:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:03,534 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2020-10-27 14:31:03,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:31:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2020-10-27 14:31:03,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-27 14:31:03,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:03,535 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:03,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 14:31:03,535 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:03,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1340002917, now seen corresponding path program 16 times [2020-10-27 14:31:03,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:03,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612283148] [2020-10-27 14:31:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:03,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:03,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:08,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:08,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-27 14:31:08,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:31:08,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-27 14:31:08,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:08,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:31:08,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 14:31:08,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 14:31:08,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:09,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:09,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:09,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:09,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:09,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:09,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:09,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:09,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:09,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:09,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:09,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:09,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-10-27 14:31:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:09,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:09,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:09,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:31:09,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:09,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:31:09,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:09,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:09,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:31:09,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:09,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2092 backedges. 2 proven. 1247 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2020-10-27 14:31:09,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612283148] [2020-10-27 14:31:09,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:09,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:31:09,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393672691] [2020-10-27 14:31:09,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:31:09,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:09,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:31:09,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:31:09,250 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand 33 states. [2020-10-27 14:31:09,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:09,723 INFO L93 Difference]: Finished difference Result 289 states and 354 transitions. [2020-10-27 14:31:09,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:31:09,723 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 170 [2020-10-27 14:31:09,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:09,725 INFO L225 Difference]: With dead ends: 289 [2020-10-27 14:31:09,725 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 14:31:09,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:31:09,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 14:31:09,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2020-10-27 14:31:09,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-27 14:31:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 210 transitions. [2020-10-27 14:31:09,741 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 210 transitions. Word has length 170 [2020-10-27 14:31:09,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:09,741 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 210 transitions. [2020-10-27 14:31:09,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:31:09,741 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 210 transitions. [2020-10-27 14:31:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-27 14:31:09,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:09,743 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:09,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 14:31:09,743 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:09,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:09,743 INFO L82 PathProgramCache]: Analyzing trace with hash -520957913, now seen corresponding path program 17 times [2020-10-27 14:31:09,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:09,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618345380] [2020-10-27 14:31:09,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:09,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:09,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking...