/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:21:07,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:21:07,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:21:07,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:21:07,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:21:07,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:21:07,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:21:07,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:21:07,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:21:07,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:21:07,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:21:07,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:21:07,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:21:07,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:21:07,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:21:07,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:21:07,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:21:07,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:21:07,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:21:07,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:21:07,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:21:07,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:21:07,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:21:07,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:21:07,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:21:07,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:21:07,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:21:07,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:21:07,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:21:07,193 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:21:07,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:21:07,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:21:07,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:21:07,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:21:07,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:21:07,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:21:07,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:21:07,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:21:07,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:21:07,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:21:07,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:21:07,208 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 [2020-10-26 19:21:07,259 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:21:07,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:21:07,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:21:07,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:21:07,264 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:21:07,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:21:07,265 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:21:07,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:21:07,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:21:07,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:21:07,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:21:07,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:21:07,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:21:07,267 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:21:07,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:21:07,267 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:21:07,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:21:07,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:21:07,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:21:07,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:21:07,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:21:07,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:21:07,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:21:07,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:21:07,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:21:07,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:21:07,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:21:07,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:21:07,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:21:07,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:21:07,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:21:07,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:21:07,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:21:07,739 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:21:07,740 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:21:07,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2020-10-26 19:21:07,817 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d1dc5621/49c0824a675e48278e29f688ffbacbd7/FLAG8342390a4 [2020-10-26 19:21:08,382 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:21:08,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2020-10-26 19:21:08,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d1dc5621/49c0824a675e48278e29f688ffbacbd7/FLAG8342390a4 [2020-10-26 19:21:08,739 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d1dc5621/49c0824a675e48278e29f688ffbacbd7 [2020-10-26 19:21:08,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:21:08,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:21:08,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:21:08,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:21:08,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:21:08,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:21:08" (1/1) ... [2020-10-26 19:21:08,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55aaacd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:08, skipping insertion in model container [2020-10-26 19:21:08,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:21:08" (1/1) ... [2020-10-26 19:21:08,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:21:08,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:21:08,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:21:08,987 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:21:09,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:21:09,041 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:21:09,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:09 WrapperNode [2020-10-26 19:21:09,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:21:09,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:21:09,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:21:09,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:21:09,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:09" (1/1) ... [2020-10-26 19:21:09,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:09" (1/1) ... [2020-10-26 19:21:09,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:09" (1/1) ... [2020-10-26 19:21:09,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:09" (1/1) ... [2020-10-26 19:21:09,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:09" (1/1) ... [2020-10-26 19:21:09,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:09" (1/1) ... [2020-10-26 19:21:09,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:09" (1/1) ... [2020-10-26 19:21:09,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:21:09,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:21:09,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:21:09,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:21:09,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:09" (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 [2020-10-26 19:21:09,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:21:09,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:21:09,194 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:21:09,194 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:21:09,195 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:21:09,196 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:21:09,196 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:21:09,196 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:21:09,197 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:21:09,197 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:21:09,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:21:09,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:21:09,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:21:09,199 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:21:09,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:21:09,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:21:09,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:21:09,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:21:09,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:21:09,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:21:09,981 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:21:09,982 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-26 19:21:09,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:21:09 BoogieIcfgContainer [2020-10-26 19:21:09,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:21:09,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:21:09,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:21:09,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:21:09,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:21:08" (1/3) ... [2020-10-26 19:21:09,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbb0363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:21:09, skipping insertion in model container [2020-10-26 19:21:09,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:09" (2/3) ... [2020-10-26 19:21:09,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbb0363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:21:09, skipping insertion in model container [2020-10-26 19:21:09,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:21:09" (3/3) ... [2020-10-26 19:21:09,993 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-1.i [2020-10-26 19:21:10,005 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:21:10,010 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:21:10,024 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:21:10,052 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:21:10,052 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:21:10,052 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:21:10,052 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:21:10,052 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:21:10,053 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:21:10,053 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:21:10,053 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:21:10,071 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-26 19:21:10,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:21:10,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:10,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:10,079 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:10,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:10,086 INFO L82 PathProgramCache]: Analyzing trace with hash -706380544, now seen corresponding path program 1 times [2020-10-26 19:21:10,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:10,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340599563] [2020-10-26 19:21:10,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:10,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:10,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:10,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:10,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:10,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:10,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:10,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:10,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:10,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:11,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:13,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:13,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:21:13,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:21:13,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3216 [2020-10-26 19:21:13,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:13,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:13,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:21:13,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:13,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 19:21:13,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:13,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:13,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:13,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:13,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:13,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:21:13,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:13,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:13,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:13,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:13,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:13,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340599563] [2020-10-26 19:21:13,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:21:13,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:21:13,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961456488] [2020-10-26 19:21:13,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:21:13,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:13,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:21:13,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:21:13,616 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-10-26 19:21:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:13,896 INFO L93 Difference]: Finished difference Result 101 states and 147 transitions. [2020-10-26 19:21:13,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:21:13,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-10-26 19:21:13,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:13,912 INFO L225 Difference]: With dead ends: 101 [2020-10-26 19:21:13,912 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:21:13,918 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 [2020-10-26 19:21:13,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:21:13,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-26 19:21:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:21:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-10-26 19:21:13,983 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 33 [2020-10-26 19:21:13,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:13,984 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-10-26 19:21:13,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:21:13,984 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-10-26 19:21:13,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:21:13,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:13,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:13,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:21:13,990 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:13,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:13,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1329797022, now seen corresponding path program 1 times [2020-10-26 19:21:13,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:13,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804086536] [2020-10-26 19:21:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:14,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:14,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:14,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:14,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:14,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:14,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:14,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:14,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:14,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:14,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:19,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:19,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:21:19,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:21:19,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:21:19,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:19,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:21:19,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:19,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:21:19,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:19,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:19,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:19,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:19,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:19,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:19,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:21:19,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:19,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:19,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:19,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:19,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:19,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804086536] [2020-10-26 19:21:19,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:21:19,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:21:19,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839100369] [2020-10-26 19:21:19,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:21:19,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:19,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:21:19,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:21:19,114 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 4 states. [2020-10-26 19:21:19,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:19,397 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-10-26 19:21:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:21:19,398 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-26 19:21:19,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:19,400 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:21:19,400 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:21:19,402 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 [2020-10-26 19:21:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:21:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-26 19:21:19,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:21:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-10-26 19:21:19,423 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 33 [2020-10-26 19:21:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:19,423 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-10-26 19:21:19,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:21:19,423 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-10-26 19:21:19,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:21:19,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:19,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:19,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:21:19,426 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:19,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:19,427 INFO L82 PathProgramCache]: Analyzing trace with hash -377888576, now seen corresponding path program 1 times [2020-10-26 19:21:19,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:19,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918422926] [2020-10-26 19:21:19,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:19,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:19,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:19,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:19,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:19,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:19,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:19,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:19,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:19,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:20,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:24,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:24,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:21:24,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:21:24,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:21:24,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:24,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:21:24,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:24,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:21:24,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:24,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:24,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:24,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:24,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:24,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:24,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:21:24,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:24,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:24,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:24,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:24,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:21:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:24,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918422926] [2020-10-26 19:21:24,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:24,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:21:24,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570137461] [2020-10-26 19:21:24,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:21:24,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:24,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:21:24,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:21:24,560 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 5 states. [2020-10-26 19:21:24,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:24,788 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-10-26 19:21:24,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:21:24,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-26 19:21:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:24,791 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:21:24,791 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:21:24,793 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 [2020-10-26 19:21:24,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:21:24,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-26 19:21:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:21:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-26 19:21:24,810 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 35 [2020-10-26 19:21:24,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:24,813 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-26 19:21:24,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:21:24,813 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-26 19:21:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:21:24,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:24,814 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:24,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:21:24,815 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:24,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:24,815 INFO L82 PathProgramCache]: Analyzing trace with hash -421906018, now seen corresponding path program 2 times [2020-10-26 19:21:24,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:24,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431431844] [2020-10-26 19:21:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:24,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:24,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:24,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:24,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:24,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:24,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:24,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:25,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:25,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:26,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:29,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:21:29,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:21:29,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:21:29,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:29,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:21:29,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:29,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:21:29,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:21:29,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:29,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:29,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:29,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:29,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:21:29,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:29,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:29,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:29,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:29,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:29,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431431844] [2020-10-26 19:21:29,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:29,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:21:29,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381333646] [2020-10-26 19:21:29,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:21:29,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:29,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:21:29,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:21:29,926 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 6 states. [2020-10-26 19:21:30,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:30,150 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-10-26 19:21:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:21:30,151 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-26 19:21:30,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:30,153 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:21:30,153 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:21:30,155 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 [2020-10-26 19:21:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:21:30,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-26 19:21:30,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:21:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2020-10-26 19:21:30,170 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 37 [2020-10-26 19:21:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:30,171 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2020-10-26 19:21:30,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:21:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2020-10-26 19:21:30,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:21:30,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:30,174 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:30,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:21:30,174 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:30,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:30,176 INFO L82 PathProgramCache]: Analyzing trace with hash 227005180, now seen corresponding path program 3 times [2020-10-26 19:21:30,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:30,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713278377] [2020-10-26 19:21:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:30,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:30,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:30,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:30,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:30,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:30,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:30,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:30,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:30,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:32,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:35,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:35,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:21:35,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:21:35,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:21:35,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:35,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:21:35,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:35,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:21:35,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:35,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:35,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:35,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:35,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:35,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:35,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:35,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:35,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:35,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:35,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:35,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:35,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713278377] [2020-10-26 19:21:35,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:35,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:21:35,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951009792] [2020-10-26 19:21:35,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:21:35,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:35,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:21:35,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:21:35,302 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 7 states. [2020-10-26 19:21:35,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:35,496 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2020-10-26 19:21:35,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:21:35,496 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-10-26 19:21:35,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:35,497 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:21:35,497 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:21:35,498 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 [2020-10-26 19:21:35,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:21:35,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-26 19:21:35,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:21:35,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-26 19:21:35,506 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 39 [2020-10-26 19:21:35,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:35,506 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-26 19:21:35,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:21:35,507 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-26 19:21:35,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:21:35,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:35,508 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:35,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:21:35,509 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:35,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:35,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1060408538, now seen corresponding path program 4 times [2020-10-26 19:21:35,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:35,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241809427] [2020-10-26 19:21:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:35,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:35,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:35,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:35,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:35,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:35,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:35,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:35,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:36,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:39,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:40,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:40,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:21:40,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:21:40,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:21:40,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:40,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:21:40,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:40,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:21:40,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:40,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:40,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:40,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:40,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:40,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:40,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:21:40,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:40,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:40,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:40,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:40,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:40,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241809427] [2020-10-26 19:21:40,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:40,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:21:40,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000485026] [2020-10-26 19:21:40,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:21:40,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:40,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:21:40,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:21:40,646 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 8 states. [2020-10-26 19:21:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:40,851 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2020-10-26 19:21:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:21:40,851 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-26 19:21:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:40,853 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:21:40,853 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:21:40,854 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 [2020-10-26 19:21:40,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:21:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-26 19:21:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:21:40,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-10-26 19:21:40,861 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 41 [2020-10-26 19:21:40,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:40,862 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-10-26 19:21:40,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:21:40,862 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-10-26 19:21:40,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:21:40,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:40,863 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:40,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:21:40,863 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:40,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1197848776, now seen corresponding path program 5 times [2020-10-26 19:21:40,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:40,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246864602] [2020-10-26 19:21:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:40,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:40,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:40,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:40,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:40,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:40,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:41,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:41,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:42,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:45,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:45,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:21:45,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:21:45,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:21:45,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:45,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:21:45,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:45,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:21:45,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:46,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:46,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:46,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:46,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:46,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:46,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:21:46,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:46,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:46,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:46,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:46,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:46,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246864602] [2020-10-26 19:21:46,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:46,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:21:46,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932179948] [2020-10-26 19:21:46,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:21:46,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:46,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:21:46,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:21:46,027 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 9 states. [2020-10-26 19:21:46,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:46,212 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2020-10-26 19:21:46,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:21:46,213 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-26 19:21:46,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:46,214 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:21:46,214 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:21:46,215 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 [2020-10-26 19:21:46,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:21:46,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-26 19:21:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:21:46,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-10-26 19:21:46,227 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 43 [2020-10-26 19:21:46,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:46,227 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-10-26 19:21:46,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:21:46,227 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-10-26 19:21:46,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:21:46,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:46,230 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:46,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:21:46,235 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:46,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:46,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1870324246, now seen corresponding path program 6 times [2020-10-26 19:21:46,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:46,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723406174] [2020-10-26 19:21:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:46,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:46,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:46,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:46,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:46,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:46,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:46,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:46,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:48,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:51,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:51,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:21:51,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:21:51,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:21:51,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:51,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:21:51,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:51,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:21:51,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:51,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:51,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:51,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:51,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:51,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:51,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:21:51,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:51,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:51,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:51,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:51,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:51,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723406174] [2020-10-26 19:21:51,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:51,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:21:51,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438497660] [2020-10-26 19:21:51,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:21:51,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:51,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:21:51,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:21:51,456 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 10 states. [2020-10-26 19:21:51,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:51,678 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2020-10-26 19:21:51,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:21:51,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-26 19:21:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:51,679 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:21:51,680 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:21:51,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:21:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:21:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-26 19:21:51,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:21:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-10-26 19:21:51,692 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 45 [2020-10-26 19:21:51,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:51,693 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-10-26 19:21:51,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:21:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-10-26 19:21:51,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:21:51,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:51,696 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:51,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:21:51,696 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:51,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:51,697 INFO L82 PathProgramCache]: Analyzing trace with hash -257933964, now seen corresponding path program 7 times [2020-10-26 19:21:51,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:51,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683667956] [2020-10-26 19:21:51,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:51,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:51,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:51,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:51,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:51,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:51,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:52,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:52,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:52,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:56,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:56,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:21:56,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:21:56,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:21:56,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:56,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:21:56,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:56,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:21:56,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:56,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:56,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:56,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:56,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:56,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:56,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:21:56,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:56,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:56,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:56,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:56,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:21:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:56,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683667956] [2020-10-26 19:21:56,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:56,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:21:56,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067209696] [2020-10-26 19:21:56,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:21:56,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:56,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:21:56,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:21:56,879 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 11 states. [2020-10-26 19:21:57,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:57,058 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-10-26 19:21:57,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:21:57,059 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-26 19:21:57,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:57,060 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:21:57,060 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:21:57,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:21:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:21:57,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-26 19:21:57,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:21:57,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-10-26 19:21:57,071 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 47 [2020-10-26 19:21:57,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:57,072 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-10-26 19:21:57,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:21:57,072 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-10-26 19:21:57,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:21:57,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:57,075 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:57,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:21:57,075 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:57,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1109640878, now seen corresponding path program 8 times [2020-10-26 19:21:57,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:57,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837252818] [2020-10-26 19:21:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:57,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:57,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:57,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:57,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:57,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:57,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:57,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:58,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:58,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:02,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:02,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:22:02,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:22:02,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:22:02,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:02,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:22:02,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:02,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:22:02,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:02,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:02,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:02,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:02,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:02,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:02,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:22:02,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:02,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:02,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:02,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:02,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:02,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837252818] [2020-10-26 19:22:02,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:02,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:22:02,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83415599] [2020-10-26 19:22:02,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:22:02,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:02,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:22:02,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:22:02,300 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 12 states. [2020-10-26 19:22:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:02,675 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2020-10-26 19:22:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:22:02,676 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-26 19:22:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:02,677 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:22:02,677 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:22:02,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:22:02,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:22:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-26 19:22:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:22:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-10-26 19:22:02,684 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 49 [2020-10-26 19:22:02,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:02,685 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-10-26 19:22:02,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:22:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-10-26 19:22:02,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:22:02,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:02,686 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:02,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:22:02,686 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:02,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:02,687 INFO L82 PathProgramCache]: Analyzing trace with hash 738768304, now seen corresponding path program 9 times [2020-10-26 19:22:02,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:02,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769641096] [2020-10-26 19:22:02,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:02,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:02,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:02,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:02,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:02,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:02,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:03,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:03,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:06,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:07,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:07,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:07,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:22:07,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:22:07,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:22:07,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:07,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:22:07,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:07,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:22:07,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:07,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:07,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:07,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:07,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:07,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:07,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:07,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:07,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:07,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:07,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:07,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:07,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769641096] [2020-10-26 19:22:07,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:07,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:22:07,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257820812] [2020-10-26 19:22:07,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:22:07,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:07,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:22:07,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:22:07,872 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 13 states. [2020-10-26 19:22:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:08,097 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2020-10-26 19:22:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:22:08,098 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-26 19:22:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:08,099 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:22:08,099 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:22:08,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:22:08,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:22:08,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-26 19:22:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:22:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-10-26 19:22:08,114 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 51 [2020-10-26 19:22:08,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:08,116 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-10-26 19:22:08,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:22:08,116 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-10-26 19:22:08,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:22:08,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:08,117 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:08,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:22:08,117 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:08,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:08,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1056468338, now seen corresponding path program 10 times [2020-10-26 19:22:08,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:08,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061271972] [2020-10-26 19:22:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:08,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:08,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:08,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:08,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:08,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:08,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:08,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:08,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:13,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:13,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:13,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:13,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:22:13,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:22:13,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:22:13,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:13,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:22:13,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:13,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:22:13,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:13,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:13,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:13,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:13,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:13,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:13,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:22:13,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:13,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:13,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:13,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:13,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:13,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061271972] [2020-10-26 19:22:13,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:13,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:22:13,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852372609] [2020-10-26 19:22:13,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:22:13,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:13,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:22:13,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:22:13,339 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 14 states. [2020-10-26 19:22:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:13,551 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2020-10-26 19:22:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:22:13,551 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-26 19:22:13,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:13,552 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:22:13,552 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:22:13,553 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 [2020-10-26 19:22:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:22:13,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-26 19:22:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:22:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-10-26 19:22:13,567 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 53 [2020-10-26 19:22:13,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:13,567 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-10-26 19:22:13,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:22:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-10-26 19:22:13,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:22:13,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:13,568 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:13,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:22:13,569 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:13,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:13,572 INFO L82 PathProgramCache]: Analyzing trace with hash 297971692, now seen corresponding path program 11 times [2020-10-26 19:22:13,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:13,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71224919] [2020-10-26 19:22:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:13,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:13,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:13,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:13,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:13,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:13,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:14,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:14,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:18,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:18,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:22:18,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:22:18,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:22:18,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:18,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:22:18,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:18,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:22:18,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:18,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:18,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:18,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:18,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:18,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:18,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:22:18,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:18,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:18,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:18,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:18,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:18,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71224919] [2020-10-26 19:22:18,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:18,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:22:18,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322355689] [2020-10-26 19:22:18,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:22:18,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:18,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:22:18,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:22:18,881 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 15 states. [2020-10-26 19:22:19,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:19,183 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2020-10-26 19:22:19,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:22:19,183 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-10-26 19:22:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:19,184 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:22:19,185 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:22:19,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:22:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:22:19,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-26 19:22:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:22:19,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2020-10-26 19:22:19,196 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 55 [2020-10-26 19:22:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:19,199 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2020-10-26 19:22:19,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:22:19,200 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2020-10-26 19:22:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:22:19,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:19,201 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:19,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:22:19,201 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:19,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:19,202 INFO L82 PathProgramCache]: Analyzing trace with hash 539749834, now seen corresponding path program 12 times [2020-10-26 19:22:19,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:19,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513451844] [2020-10-26 19:22:19,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:19,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:19,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:19,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:19,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:19,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:19,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:20,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:23,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:23,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:23,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:24,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:24,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:22:24,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:22:24,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:22:24,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:24,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:22:24,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:24,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:22:24,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:24,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:24,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:24,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:24,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:24,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:24,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:22:24,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:24,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:24,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:24,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:24,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:24,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513451844] [2020-10-26 19:22:24,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:24,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:22:24,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079851009] [2020-10-26 19:22:24,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:22:24,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:24,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:22:24,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:22:24,452 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand 16 states. [2020-10-26 19:22:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:24,673 INFO L93 Difference]: Finished difference Result 114 states and 134 transitions. [2020-10-26 19:22:24,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:22:24,673 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-10-26 19:22:24,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:24,674 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:22:24,674 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:22:24,675 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 [2020-10-26 19:22:24,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:22:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-26 19:22:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:22:24,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-10-26 19:22:24,681 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 57 [2020-10-26 19:22:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:24,681 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-10-26 19:22:24,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:22:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-10-26 19:22:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:22:24,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:24,682 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:24,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:22:24,682 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash 960310312, now seen corresponding path program 13 times [2020-10-26 19:22:24,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:24,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952318206] [2020-10-26 19:22:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:24,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:24,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:24,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:24,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:24,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:25,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:25,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:29,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:29,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:22:29,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:22:29,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:22:29,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:29,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:22:29,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:29,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:22:29,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:29,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:29,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:29,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:29,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:29,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:29,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:29,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:29,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:29,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:29,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:29,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:29,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952318206] [2020-10-26 19:22:29,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:29,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:22:29,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939005740] [2020-10-26 19:22:29,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:22:29,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:29,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:22:29,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:22:29,972 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 17 states. [2020-10-26 19:22:30,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:30,200 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-10-26 19:22:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:22:30,201 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-10-26 19:22:30,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:30,202 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:22:30,202 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:22:30,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:22:30,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:22:30,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-26 19:22:30,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:22:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-10-26 19:22:30,214 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 59 [2020-10-26 19:22:30,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:30,214 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-10-26 19:22:30,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:22:30,214 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-10-26 19:22:30,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:22:30,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:30,215 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:30,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:22:30,215 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:30,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:30,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1392003846, now seen corresponding path program 14 times [2020-10-26 19:22:30,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:30,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689401354] [2020-10-26 19:22:30,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:30,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:30,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:30,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:30,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:30,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:31,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:31,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:35,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:35,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:22:35,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:22:35,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:22:35,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:35,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:22:35,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:35,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:22:35,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:35,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:35,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:35,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:35,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:35,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:35,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:35,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:35,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:35,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:35,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:35,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:35,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689401354] [2020-10-26 19:22:35,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:35,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:22:35,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227732836] [2020-10-26 19:22:35,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:22:35,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:35,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:22:35,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:22:35,524 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 18 states. [2020-10-26 19:22:35,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:35,782 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2020-10-26 19:22:35,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:22:35,783 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-10-26 19:22:35,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:35,784 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:22:35,784 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:22:35,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:22:35,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:22:35,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-26 19:22:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:22:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-10-26 19:22:35,792 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 61 [2020-10-26 19:22:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:35,794 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-10-26 19:22:35,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:22:35,794 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-10-26 19:22:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:22:35,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:35,795 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:35,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:22:35,795 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:35,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:35,796 INFO L82 PathProgramCache]: Analyzing trace with hash -362337692, now seen corresponding path program 15 times [2020-10-26 19:22:35,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:35,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356061287] [2020-10-26 19:22:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:35,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:35,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:35,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:35,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:35,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:36,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:36,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:40,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:40,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:22:40,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:22:40,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:22:40,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:40,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:22:40,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:40,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:22:40,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:41,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:41,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:41,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:41,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:41,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:41,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:41,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:41,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:41,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:41,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:41,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:41,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356061287] [2020-10-26 19:22:41,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:41,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:22:41,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169656915] [2020-10-26 19:22:41,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:22:41,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:41,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:22:41,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:22:41,117 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 19 states. [2020-10-26 19:22:41,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:41,423 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2020-10-26 19:22:41,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:22:41,424 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2020-10-26 19:22:41,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:41,425 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:22:41,425 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:22:41,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:22:41,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:22:41,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-26 19:22:41,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 19:22:41,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-10-26 19:22:41,434 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 63 [2020-10-26 19:22:41,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:41,435 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-10-26 19:22:41,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:22:41,435 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-10-26 19:22:41,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:22:41,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:41,436 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:41,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:22:41,436 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:41,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:41,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1637591618, now seen corresponding path program 16 times [2020-10-26 19:22:41,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:41,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27444808] [2020-10-26 19:22:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:41,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:41,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:41,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:41,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:41,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:42,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:45,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:45,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:45,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:46,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:46,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:22:46,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:22:46,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:22:46,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:46,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:22:46,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:46,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:22:46,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:46,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:46,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:46,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:46,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:46,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:46,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:22:46,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:46,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:46,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:46,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:46,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:46,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27444808] [2020-10-26 19:22:46,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:46,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:22:46,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219238742] [2020-10-26 19:22:46,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:22:46,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:46,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:22:46,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:22:46,795 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 20 states. [2020-10-26 19:22:47,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:47,073 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2020-10-26 19:22:47,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:22:47,074 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2020-10-26 19:22:47,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:47,075 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:22:47,076 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:22:47,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:22:47,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:22:47,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-26 19:22:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:22:47,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2020-10-26 19:22:47,082 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 65 [2020-10-26 19:22:47,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:47,082 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2020-10-26 19:22:47,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:22:47,082 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2020-10-26 19:22:47,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:22:47,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:47,083 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:47,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:22:47,084 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:47,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:47,084 INFO L82 PathProgramCache]: Analyzing trace with hash -575690080, now seen corresponding path program 17 times [2020-10-26 19:22:47,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:47,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484190328] [2020-10-26 19:22:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:47,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:47,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:47,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:47,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:47,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:48,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:52,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:52,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:52,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:22:52,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:22:52,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:22:52,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:52,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:22:52,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:52,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:22:52,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:52,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:52,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:52,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:52,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:52,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:52,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:52,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:52,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:52,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:52,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:52,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:52,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484190328] [2020-10-26 19:22:52,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:52,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:22:52,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418124492] [2020-10-26 19:22:52,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:22:52,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:52,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:22:52,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:22:52,466 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand 21 states. [2020-10-26 19:22:52,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:52,676 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2020-10-26 19:22:52,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:22:52,677 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-10-26 19:22:52,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:52,678 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:22:52,678 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:22:52,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:22:52,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:22:52,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-26 19:22:52,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:22:52,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-10-26 19:22:52,685 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 67 [2020-10-26 19:22:52,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:52,685 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-10-26 19:22:52,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:22:52,685 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-10-26 19:22:52,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:22:52,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:52,686 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:52,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:22:52,686 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:52,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:52,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1530590338, now seen corresponding path program 18 times [2020-10-26 19:22:52,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:52,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547553244] [2020-10-26 19:22:52,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:52,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:52,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:52,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:52,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:52,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:54,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:57,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:57,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:22:57,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:22:57,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:22:57,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:57,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:22:57,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:57,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:22:57,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:58,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:58,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:58,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:58,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:58,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:58,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:58,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:58,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:58,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:58,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:58,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:58,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547553244] [2020-10-26 19:22:58,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:58,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:22:58,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307442651] [2020-10-26 19:22:58,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:22:58,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:58,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:22:58,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:22:58,070 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 22 states. [2020-10-26 19:22:58,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:58,295 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2020-10-26 19:22:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:22:58,296 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 69 [2020-10-26 19:22:58,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:58,297 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:22:58,297 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:22:58,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:22:58,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:22:58,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-26 19:22:58,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:22:58,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2020-10-26 19:22:58,304 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 69 [2020-10-26 19:22:58,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:58,304 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2020-10-26 19:22:58,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:22:58,304 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2020-10-26 19:22:58,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:22:58,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:58,305 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:58,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:22:58,306 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:58,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:58,306 INFO L82 PathProgramCache]: Analyzing trace with hash -66736932, now seen corresponding path program 19 times [2020-10-26 19:22:58,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:58,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205633217] [2020-10-26 19:22:58,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:58,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:58,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:58,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:58,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:58,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:01,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:01,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:01,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:03,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:03,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:23:03,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:23:03,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:23:03,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:03,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:23:03,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:03,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:23:03,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:03,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:03,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:03,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:03,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:03,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:03,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:23:03,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:03,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:03,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:03,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:03,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:03,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205633217] [2020-10-26 19:23:03,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:03,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:23:03,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047964765] [2020-10-26 19:23:03,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:23:03,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:03,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:23:03,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:23:03,734 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 23 states. [2020-10-26 19:23:03,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:03,989 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2020-10-26 19:23:03,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:23:03,989 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 71 [2020-10-26 19:23:03,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:03,990 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:23:03,990 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:23:03,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:23:03,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:23:03,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-26 19:23:03,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:23:03,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2020-10-26 19:23:03,996 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 71 [2020-10-26 19:23:03,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:03,997 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2020-10-26 19:23:03,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:23:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2020-10-26 19:23:03,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:23:03,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:03,998 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:03,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:23:03,998 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:03,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2052886854, now seen corresponding path program 20 times [2020-10-26 19:23:03,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:03,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394729451] [2020-10-26 19:23:03,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:04,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:04,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:04,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:04,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:04,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:07,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:07,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:07,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:09,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:09,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:23:09,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:23:09,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:23:09,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:09,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:23:09,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:09,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:23:09,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:09,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:09,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:09,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:09,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:09,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:09,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:09,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:09,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:09,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:09,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:09,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:09,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394729451] [2020-10-26 19:23:09,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:09,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:23:09,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613634030] [2020-10-26 19:23:09,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:23:09,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:09,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:23:09,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:23:09,440 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 24 states. [2020-10-26 19:23:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:09,777 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2020-10-26 19:23:09,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:23:09,781 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 73 [2020-10-26 19:23:09,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:09,782 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:23:09,782 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:23:09,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:23:09,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:23:09,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-26 19:23:09,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:23:09,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2020-10-26 19:23:09,793 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 73 [2020-10-26 19:23:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:09,793 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2020-10-26 19:23:09,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:23:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2020-10-26 19:23:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:23:09,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:09,795 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:09,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:23:09,795 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:09,796 INFO L82 PathProgramCache]: Analyzing trace with hash 517484824, now seen corresponding path program 21 times [2020-10-26 19:23:09,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:09,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881719100] [2020-10-26 19:23:09,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:09,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:09,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:09,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:09,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:10,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:13,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:13,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:13,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:14,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:14,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:23:14,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:23:14,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 19:23:14,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:14,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:23:14,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:14,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:23:14,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:15,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:15,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:15,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:15,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:15,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:15,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:15,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:15,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:15,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:15,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:15,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:15,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881719100] [2020-10-26 19:23:15,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:15,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:23:15,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141885520] [2020-10-26 19:23:15,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:23:15,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:15,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:23:15,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:23:15,340 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 25 states. [2020-10-26 19:23:15,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:15,628 INFO L93 Difference]: Finished difference Result 132 states and 152 transitions. [2020-10-26 19:23:15,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:23:15,629 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 75 [2020-10-26 19:23:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:15,630 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:23:15,630 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:23:15,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:23:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:23:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-26 19:23:15,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:23:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2020-10-26 19:23:15,636 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 75 [2020-10-26 19:23:15,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:15,636 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2020-10-26 19:23:15,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:23:15,636 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2020-10-26 19:23:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:23:15,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:15,637 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:15,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:23:15,638 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:15,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:15,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1038472182, now seen corresponding path program 22 times [2020-10-26 19:23:15,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:15,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078695426] [2020-10-26 19:23:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:15,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:15,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:15,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:15,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:15,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:19,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:19,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:20,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:20,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:20,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:23:20,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:23:20,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:23:20,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:20,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:23:20,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:20,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:23:20,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:21,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:21,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:21,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:21,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:21,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:21,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:23:21,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:21,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:21,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:21,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:21,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:21,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078695426] [2020-10-26 19:23:21,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:21,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:23:21,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773227542] [2020-10-26 19:23:21,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:23:21,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:21,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:23:21,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:23:21,169 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 26 states. [2020-10-26 19:23:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:21,435 INFO L93 Difference]: Finished difference Result 134 states and 154 transitions. [2020-10-26 19:23:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:23:21,436 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 77 [2020-10-26 19:23:21,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:21,437 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:23:21,437 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:23:21,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:23:21,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:23:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-26 19:23:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:23:21,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2020-10-26 19:23:21,448 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 77 [2020-10-26 19:23:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:21,448 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2020-10-26 19:23:21,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:23:21,448 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2020-10-26 19:23:21,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:23:21,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:21,450 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:21,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:23:21,452 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:21,453 INFO L82 PathProgramCache]: Analyzing trace with hash -803850412, now seen corresponding path program 23 times [2020-10-26 19:23:21,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:21,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071175813] [2020-10-26 19:23:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:21,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:21,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:21,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:21,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:24,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:24,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:24,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:24,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:26,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:26,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:23:26,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:23:26,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 19:23:26,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:26,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:23:26,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:26,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:23:26,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:27,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:27,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:27,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:27,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:27,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:27,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:27,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:27,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:27,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:27,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:27,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:27,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071175813] [2020-10-26 19:23:27,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:27,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:23:27,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691801217] [2020-10-26 19:23:27,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:23:27,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:27,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:23:27,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:23:27,055 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand 27 states. [2020-10-26 19:23:27,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:27,327 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2020-10-26 19:23:27,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:23:27,328 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-10-26 19:23:27,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:27,329 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:23:27,329 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:23:27,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:23:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:23:27,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-26 19:23:27,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:23:27,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2020-10-26 19:23:27,336 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 79 [2020-10-26 19:23:27,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:27,336 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2020-10-26 19:23:27,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:23:27,337 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2020-10-26 19:23:27,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:23:27,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:27,337 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:27,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:23:27,338 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:27,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:27,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1749337294, now seen corresponding path program 24 times [2020-10-26 19:23:27,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:27,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055756383] [2020-10-26 19:23:27,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:27,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:27,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:27,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:27,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:30,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:30,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:30,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:32,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:32,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:23:32,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:23:32,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:23:32,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:32,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:23:32,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:32,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:23:32,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:32,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:32,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:32,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:32,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:32,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:32,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:32,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:32,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:32,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:32,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:32,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:32,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055756383] [2020-10-26 19:23:32,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:32,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:23:32,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875670020] [2020-10-26 19:23:32,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:23:32,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:32,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:23:32,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:23:32,957 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 28 states. [2020-10-26 19:23:33,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:33,299 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2020-10-26 19:23:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:23:33,300 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 81 [2020-10-26 19:23:33,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:33,302 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:23:33,302 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:23:33,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:23:33,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:23:33,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-26 19:23:33,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:23:33,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2020-10-26 19:23:33,308 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 81 [2020-10-26 19:23:33,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:33,309 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2020-10-26 19:23:33,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:23:33,309 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2020-10-26 19:23:33,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:23:33,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:33,310 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:33,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:23:33,311 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:33,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:33,311 INFO L82 PathProgramCache]: Analyzing trace with hash 170835856, now seen corresponding path program 25 times [2020-10-26 19:23:33,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:33,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702447790] [2020-10-26 19:23:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:33,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:33,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:33,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:33,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:36,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:36,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:36,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:38,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:38,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:23:38,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:23:38,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 19:23:38,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:38,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:23:38,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:38,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:23:38,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:38,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:38,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:38,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:38,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:38,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:38,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:23:38,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:38,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:38,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:38,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:38,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:23:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:38,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702447790] [2020-10-26 19:23:38,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:38,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:23:38,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154831912] [2020-10-26 19:23:38,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:23:38,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:38,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:23:38,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:23:38,983 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 29 states. [2020-10-26 19:23:39,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:39,369 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2020-10-26 19:23:39,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:23:39,370 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2020-10-26 19:23:39,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:39,372 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:23:39,372 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:23:39,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:23:39,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:23:39,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-26 19:23:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:23:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-10-26 19:23:39,379 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 83 [2020-10-26 19:23:39,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:39,380 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-10-26 19:23:39,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:23:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-10-26 19:23:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:23:39,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:39,381 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:39,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:23:39,381 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:39,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:39,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1378704274, now seen corresponding path program 26 times [2020-10-26 19:23:39,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:39,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837824729] [2020-10-26 19:23:39,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:39,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:39,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:39,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:39,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:43,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:43,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:43,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:44,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:44,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:23:44,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:23:44,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:23:44,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:44,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:23:44,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:44,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:23:44,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:45,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:45,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:45,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:45,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:45,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:45,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:23:45,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:45,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:45,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:45,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:45,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:45,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837824729] [2020-10-26 19:23:45,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:45,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:23:45,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43298214] [2020-10-26 19:23:45,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:23:45,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:45,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:23:45,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:23:45,074 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 30 states. [2020-10-26 19:23:45,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:45,463 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2020-10-26 19:23:45,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:23:45,463 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2020-10-26 19:23:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:45,464 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:23:45,465 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:23:45,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:23:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:23:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-26 19:23:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:23:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2020-10-26 19:23:45,471 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 85 [2020-10-26 19:23:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:45,472 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2020-10-26 19:23:45,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:23:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2020-10-26 19:23:45,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:23:45,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:45,473 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:45,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:23:45,473 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:45,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:45,474 INFO L82 PathProgramCache]: Analyzing trace with hash -133117492, now seen corresponding path program 27 times [2020-10-26 19:23:45,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:45,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392081876] [2020-10-26 19:23:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:45,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:45,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:45,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:45,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:49,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:49,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:50,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:50,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:50,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:23:50,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:23:50,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:23:50,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:50,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:23:50,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:50,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:23:50,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:51,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:51,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:51,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:51,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:51,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:51,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:51,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:51,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:51,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:51,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:51,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:51,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392081876] [2020-10-26 19:23:51,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:51,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:23:51,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624316951] [2020-10-26 19:23:51,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:23:51,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:51,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:23:51,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:23:51,181 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand 31 states. [2020-10-26 19:23:51,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:51,593 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2020-10-26 19:23:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:23:51,594 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 87 [2020-10-26 19:23:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:51,595 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:23:51,595 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:23:51,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:23:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:23:51,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-26 19:23:51,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:23:51,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2020-10-26 19:23:51,603 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 87 [2020-10-26 19:23:51,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:51,603 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2020-10-26 19:23:51,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:23:51,603 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2020-10-26 19:23:51,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:23:51,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:51,604 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:51,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:23:51,604 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:51,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:51,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1420095574, now seen corresponding path program 28 times [2020-10-26 19:23:51,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:51,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348368526] [2020-10-26 19:23:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:51,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:51,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:51,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:51,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:56,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:56,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:56,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:56,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:56,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:23:56,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:23:56,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-26 19:23:56,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:56,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:23:56,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:56,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:23:56,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:57,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:57,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:57,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:57,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:57,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:57,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:23:57,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:57,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:57,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348368526] [2020-10-26 19:23:57,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:57,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:23:57,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146457245] [2020-10-26 19:23:57,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:23:57,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:57,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:23:57,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:23:57,394 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand 32 states. [2020-10-26 19:23:57,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:57,808 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2020-10-26 19:23:57,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:23:57,809 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2020-10-26 19:23:57,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:57,810 INFO L225 Difference]: With dead ends: 146 [2020-10-26 19:23:57,810 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:23:57,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:23:57,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:23:57,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-26 19:23:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:23:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2020-10-26 19:23:57,821 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 89 [2020-10-26 19:23:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:57,822 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2020-10-26 19:23:57,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:23:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2020-10-26 19:23:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:23:57,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:57,824 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:57,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:23:57,824 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:57,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:57,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1255451128, now seen corresponding path program 29 times [2020-10-26 19:23:57,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:57,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792679725] [2020-10-26 19:23:57,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:57,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:57,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:57,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:58,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:58,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:58,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:02,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:02,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:24:02,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:24:02,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:24:02,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:02,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:24:02,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:02,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:24:02,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:03,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:03,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:03,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:03,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:03,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:03,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:24:03,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:03,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:03,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:03,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:03,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:03,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792679725] [2020-10-26 19:24:03,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:03,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:24:03,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208326336] [2020-10-26 19:24:03,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:24:03,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:03,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:24:03,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:24:03,655 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand 33 states. [2020-10-26 19:24:04,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:04,075 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2020-10-26 19:24:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:24:04,076 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 91 [2020-10-26 19:24:04,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:04,077 INFO L225 Difference]: With dead ends: 148 [2020-10-26 19:24:04,077 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:24:04,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:24:04,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:24:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-26 19:24:04,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:24:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2020-10-26 19:24:04,084 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 91 [2020-10-26 19:24:04,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:04,084 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2020-10-26 19:24:04,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:24:04,084 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2020-10-26 19:24:04,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:24:04,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:04,086 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:04,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:24:04,086 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:04,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:04,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1945928474, now seen corresponding path program 30 times [2020-10-26 19:24:04,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:04,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967467645] [2020-10-26 19:24:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:04,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:04,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:04,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:04,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:04,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:04,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:09,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:09,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:24:09,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:24:09,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-26 19:24:09,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:09,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:24:09,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:09,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:24:09,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:09,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:09,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:09,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:09,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:09,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:09,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:09,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:09,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:09,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:09,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:09,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:09,977 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:09,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967467645] [2020-10-26 19:24:09,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:09,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:24:09,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106791793] [2020-10-26 19:24:09,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:24:09,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:09,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:24:09,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:24:09,979 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand 34 states. [2020-10-26 19:24:10,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:10,260 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2020-10-26 19:24:10,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:24:10,260 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 93 [2020-10-26 19:24:10,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:10,262 INFO L225 Difference]: With dead ends: 150 [2020-10-26 19:24:10,262 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:24:10,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:24:10,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:24:10,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-26 19:24:10,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:24:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2020-10-26 19:24:10,269 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 93 [2020-10-26 19:24:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:10,270 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2020-10-26 19:24:10,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:24:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2020-10-26 19:24:10,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 19:24:10,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:10,271 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:10,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:24:10,272 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:10,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:10,272 INFO L82 PathProgramCache]: Analyzing trace with hash 225272900, now seen corresponding path program 31 times [2020-10-26 19:24:10,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:10,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804621640] [2020-10-26 19:24:10,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:10,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:10,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:10,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:10,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:10,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:10,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:15,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:15,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:24:15,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:24:15,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:24:15,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:15,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:24:15,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:15,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:24:15,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:16,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:16,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:16,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:16,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:16,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:16,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:16,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:16,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:16,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:16,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:16,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:16,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804621640] [2020-10-26 19:24:16,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:16,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:24:16,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058159139] [2020-10-26 19:24:16,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:24:16,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:16,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:24:16,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:24:16,205 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand 35 states. [2020-10-26 19:24:16,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:16,643 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2020-10-26 19:24:16,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:24:16,648 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 95 [2020-10-26 19:24:16,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:16,648 INFO L225 Difference]: With dead ends: 152 [2020-10-26 19:24:16,649 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:24:16,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:24:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:24:16,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-26 19:24:16,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-26 19:24:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-10-26 19:24:16,655 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 95 [2020-10-26 19:24:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:16,655 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-10-26 19:24:16,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:24:16,655 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-10-26 19:24:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:24:16,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:16,656 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:16,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:24:16,657 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:16,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:16,657 INFO L82 PathProgramCache]: Analyzing trace with hash -604312542, now seen corresponding path program 32 times [2020-10-26 19:24:16,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:16,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024293609] [2020-10-26 19:24:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:16,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:16,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:16,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:16,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:17,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:17,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:21,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:21,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:24:21,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:24:21,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-26 19:24:21,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:21,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:24:21,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:21,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:24:21,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:22,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:22,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:22,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:22,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:22,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:22,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:24:22,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:22,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:22,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:22,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:22,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:22,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024293609] [2020-10-26 19:24:22,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:22,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:24:22,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143717443] [2020-10-26 19:24:22,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:24:22,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:22,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:24:22,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:24:22,789 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 36 states. [2020-10-26 19:24:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:23,249 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2020-10-26 19:24:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:24:23,250 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 97 [2020-10-26 19:24:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:23,252 INFO L225 Difference]: With dead ends: 154 [2020-10-26 19:24:23,252 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:24:23,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:24:23,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:24:23,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-26 19:24:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:24:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2020-10-26 19:24:23,259 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 97 [2020-10-26 19:24:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:23,259 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2020-10-26 19:24:23,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:24:23,259 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2020-10-26 19:24:23,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:24:23,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:23,260 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:23,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:24:23,260 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:23,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:23,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1027994752, now seen corresponding path program 33 times [2020-10-26 19:24:23,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:23,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430665767] [2020-10-26 19:24:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:23,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:23,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:23,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:23,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:23,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:23,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:28,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:28,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:24:28,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:24:28,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-26 19:24:28,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:28,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:24:28,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:28,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:24:28,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:29,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:29,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:29,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:29,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:29,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:29,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:29,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:29,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:29,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:29,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:29,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:29,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430665767] [2020-10-26 19:24:29,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:29,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:24:29,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422882994] [2020-10-26 19:24:29,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:24:29,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:29,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:24:29,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:24:29,302 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand 37 states. [2020-10-26 19:24:29,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:29,795 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2020-10-26 19:24:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:24:29,796 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 99 [2020-10-26 19:24:29,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:29,798 INFO L225 Difference]: With dead ends: 156 [2020-10-26 19:24:29,798 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:24:29,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:24:29,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:24:29,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-26 19:24:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-26 19:24:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2020-10-26 19:24:29,804 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 99 [2020-10-26 19:24:29,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:29,804 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2020-10-26 19:24:29,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:24:29,805 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2020-10-26 19:24:29,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:24:29,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:29,805 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:29,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:24:29,806 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:29,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:29,806 INFO L82 PathProgramCache]: Analyzing trace with hash 2012241246, now seen corresponding path program 34 times [2020-10-26 19:24:29,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:29,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961529171] [2020-10-26 19:24:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:29,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:29,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:29,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:30,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:30,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:30,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:34,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:34,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:24:34,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:24:34,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:24:34,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:34,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:24:34,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:34,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:24:34,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:35,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:35,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:35,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:35,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:35,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:35,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:35,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:35,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:35,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:35,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:35,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:35,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961529171] [2020-10-26 19:24:35,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:35,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:24:35,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992012710] [2020-10-26 19:24:35,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:24:35,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:35,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:24:35,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:24:35,881 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand 38 states. [2020-10-26 19:24:36,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:36,309 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2020-10-26 19:24:36,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:24:36,310 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 101 [2020-10-26 19:24:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:36,311 INFO L225 Difference]: With dead ends: 158 [2020-10-26 19:24:36,311 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 19:24:36,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:24:36,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 19:24:36,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-26 19:24:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-26 19:24:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2020-10-26 19:24:36,318 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 101 [2020-10-26 19:24:36,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:36,318 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2020-10-26 19:24:36,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:24:36,318 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2020-10-26 19:24:36,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-26 19:24:36,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:36,319 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:36,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:24:36,319 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:36,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:36,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1314650436, now seen corresponding path program 35 times [2020-10-26 19:24:36,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:36,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417308075] [2020-10-26 19:24:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:36,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:36,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:36,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:36,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:36,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:41,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:41,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-26 19:24:41,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:24:41,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:24:41,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:41,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:24:41,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:41,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:24:41,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:42,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:42,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:42,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:42,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:42,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:42,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:42,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:42,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:42,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:42,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:42,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:42,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417308075] [2020-10-26 19:24:42,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:42,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:24:42,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849157293] [2020-10-26 19:24:42,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:24:42,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:42,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:24:42,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:24:42,446 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand 39 states. [2020-10-26 19:24:42,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:42,830 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2020-10-26 19:24:42,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:24:42,830 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 103 [2020-10-26 19:24:42,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:42,831 INFO L225 Difference]: With dead ends: 160 [2020-10-26 19:24:42,832 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:24:42,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:24:42,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:24:42,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-26 19:24:42,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:24:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2020-10-26 19:24:42,842 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 103 [2020-10-26 19:24:42,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:42,842 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2020-10-26 19:24:42,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:24:42,842 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2020-10-26 19:24:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 19:24:42,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:42,843 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:42,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:24:42,844 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1293078682, now seen corresponding path program 36 times [2020-10-26 19:24:42,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:42,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515102418] [2020-10-26 19:24:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:42,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:42,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:42,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:43,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:43,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:47,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:47,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 19:24:47,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:24:47,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-26 19:24:47,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:24:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:24:47,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:49,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:49,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:49,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:49,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:49,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:49,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:24:49,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:49,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:49,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:49,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:49,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:49,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515102418] [2020-10-26 19:24:49,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:49,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:24:49,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006954480] [2020-10-26 19:24:49,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:24:49,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:49,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:24:49,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:24:49,099 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand 40 states. [2020-10-26 19:24:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:49,472 INFO L93 Difference]: Finished difference Result 162 states and 182 transitions. [2020-10-26 19:24:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:24:49,473 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 105 [2020-10-26 19:24:49,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:49,474 INFO L225 Difference]: With dead ends: 162 [2020-10-26 19:24:49,474 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:24:49,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:24:49,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:24:49,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-26 19:24:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-26 19:24:49,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2020-10-26 19:24:49,480 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 105 [2020-10-26 19:24:49,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:49,481 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2020-10-26 19:24:49,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:24:49,481 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2020-10-26 19:24:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 19:24:49,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:49,482 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:49,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:24:49,482 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:49,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:49,483 INFO L82 PathProgramCache]: Analyzing trace with hash -940139784, now seen corresponding path program 37 times [2020-10-26 19:24:49,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:49,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47230778] [2020-10-26 19:24:49,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:49,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:49,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:49,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:49,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:50,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:54,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:54,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 19:24:54,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:24:54,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 19:24:54,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:54,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:24:54,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:54,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:24:54,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:55,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:55,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:55,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:55,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:55,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:55,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:55,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:55,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:55,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:55,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:55,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:55,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47230778] [2020-10-26 19:24:55,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:55,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:24:55,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195328452] [2020-10-26 19:24:55,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:24:55,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:55,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:24:55,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:24:55,733 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand 41 states. [2020-10-26 19:24:56,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:56,145 INFO L93 Difference]: Finished difference Result 164 states and 184 transitions. [2020-10-26 19:24:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:24:56,145 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 107 [2020-10-26 19:24:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:56,147 INFO L225 Difference]: With dead ends: 164 [2020-10-26 19:24:56,147 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:24:56,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:24:56,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:24:56,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-26 19:24:56,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-26 19:24:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2020-10-26 19:24:56,154 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 107 [2020-10-26 19:24:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:56,154 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2020-10-26 19:24:56,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:24:56,154 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2020-10-26 19:24:56,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:24:56,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:56,155 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:56,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:24:56,155 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:56,156 INFO L82 PathProgramCache]: Analyzing trace with hash 420562390, now seen corresponding path program 38 times [2020-10-26 19:24:56,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:56,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235639849] [2020-10-26 19:24:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:56,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:56,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:56,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:56,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:56,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking...