/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_two_index_06.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:33:16,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:33:16,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:33:17,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:33:17,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:33:17,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:33:17,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:33:17,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:33:17,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:33:17,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:33:17,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:33:17,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:33:17,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:33:17,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:33:17,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:33:17,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:33:17,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:33:17,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:33:17,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:33:17,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:33:17,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:33:17,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:33:17,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:33:17,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:33:17,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:33:17,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:33:17,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:33:17,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:33:17,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:33:17,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:33:17,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:33:17,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:33:17,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:33:17,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:33:17,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:33:17,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:33:17,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:33:17,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:33:17,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:33:17,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:33:17,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:33:17,168 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 19:33:17,222 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:33:17,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:33:17,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:33:17,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:33:17,228 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:33:17,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:33:17,229 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:33:17,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:33:17,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:33:17,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:33:17,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:33:17,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:33:17,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:33:17,231 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:33:17,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:33:17,232 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:33:17,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:33:17,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:33:17,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:33:17,232 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:33:17,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:33:17,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:33:17,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:33:17,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:33:17,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:33:17,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:33:17,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:33:17,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:33:17,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:33:17,235 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:33:17,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:33:17,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:33:17,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:33:17,718 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:33:17,719 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:33:17,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_06.i [2020-10-26 19:33:17,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ec2d1cb7/b20bb79456a34d3facd73411087f88cf/FLAG884fafec9 [2020-10-26 19:33:18,513 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:33:18,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_06.i [2020-10-26 19:33:18,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ec2d1cb7/b20bb79456a34d3facd73411087f88cf/FLAG884fafec9 [2020-10-26 19:33:18,824 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ec2d1cb7/b20bb79456a34d3facd73411087f88cf [2020-10-26 19:33:18,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:33:18,837 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:33:18,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:33:18,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:33:18,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:33:18,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:33:18" (1/1) ... [2020-10-26 19:33:18,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e15e62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:18, skipping insertion in model container [2020-10-26 19:33:18,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:33:18" (1/1) ... [2020-10-26 19:33:18,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:33:18,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:33:19,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:33:19,065 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:33:19,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:33:19,117 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:33:19,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:19 WrapperNode [2020-10-26 19:33:19,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:33:19,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:33:19,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:33:19,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:33:19,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:19" (1/1) ... [2020-10-26 19:33:19,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:19" (1/1) ... [2020-10-26 19:33:19,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:19" (1/1) ... [2020-10-26 19:33:19,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:19" (1/1) ... [2020-10-26 19:33:19,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:19" (1/1) ... [2020-10-26 19:33:19,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:19" (1/1) ... [2020-10-26 19:33:19,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:19" (1/1) ... [2020-10-26 19:33:19,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:33:19,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:33:19,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:33:19,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:33:19,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:19" (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 19:33:19,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:33:19,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:33:19,303 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:33:19,303 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:33:19,303 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:33:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:33:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:33:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:33:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:33:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:33:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:33:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:33:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:33:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:33:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:33:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:33:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:33:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:33:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:33:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:33:19,775 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:33:19,775 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:33:19,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:33:19 BoogieIcfgContainer [2020-10-26 19:33:19,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:33:19,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:33:19,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:33:19,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:33:19,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:33:18" (1/3) ... [2020-10-26 19:33:19,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@594d640a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:33:19, skipping insertion in model container [2020-10-26 19:33:19,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:19" (2/3) ... [2020-10-26 19:33:19,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@594d640a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:33:19, skipping insertion in model container [2020-10-26 19:33:19,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:33:19" (3/3) ... [2020-10-26 19:33:19,791 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_06.i [2020-10-26 19:33:19,806 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:33:19,813 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:33:19,834 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:33:19,874 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:33:19,874 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:33:19,874 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:33:19,875 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:33:19,875 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:33:19,875 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:33:19,875 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:33:19,875 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:33:19,902 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-26 19:33:19,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:33:19,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:19,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:19,915 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:19,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:19,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1774182118, now seen corresponding path program 1 times [2020-10-26 19:33:19,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:19,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504713727] [2020-10-26 19:33:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:20,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:20,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:20,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:20,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:33:20,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:20,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-26 19:33:20,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:20,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:33:20,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:20,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:33:20,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:33:20,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:20,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:20,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:20,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:20,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:20,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:33:20,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:20,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:20,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:20,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:20,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:33:20,599 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 19:33:20,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504713727] [2020-10-26 19:33:20,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:33:20,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:33:20,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402075197] [2020-10-26 19:33:20,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:33:20,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:20,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:33:20,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:33:20,629 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2020-10-26 19:33:20,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:20,805 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2020-10-26 19:33:20,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:33:20,808 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:33:20,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:20,817 INFO L225 Difference]: With dead ends: 49 [2020-10-26 19:33:20,817 INFO L226 Difference]: Without dead ends: 22 [2020-10-26 19:33:20,821 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 19:33:20,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-26 19:33:20,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-26 19:33:20,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-26 19:33:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-26 19:33:20,867 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2020-10-26 19:33:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:20,868 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-26 19:33:20,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:33:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-26 19:33:20,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:33:20,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:20,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:20,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:33:20,870 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:20,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:20,871 INFO L82 PathProgramCache]: Analyzing trace with hash -577359468, now seen corresponding path program 1 times [2020-10-26 19:33:20,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:20,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165178241] [2020-10-26 19:33:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:20,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:20,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:21,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:21,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:33:21,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:21,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-26 19:33:21,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:21,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:33:21,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:21,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 19:33:21,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:21,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:21,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:21,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:21,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:21,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:21,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:33:21,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:21,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:21,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:21,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:21,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:33:21,388 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 19:33:21,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165178241] [2020-10-26 19:33:21,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:21,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:33:21,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831096081] [2020-10-26 19:33:21,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:33:21,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:21,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:33:21,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:33:21,394 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-10-26 19:33:21,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:21,541 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-10-26 19:33:21,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:33:21,542 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-26 19:33:21,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:21,545 INFO L225 Difference]: With dead ends: 41 [2020-10-26 19:33:21,545 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 19:33:21,546 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 19:33:21,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 19:33:21,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-10-26 19:33:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 19:33:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-26 19:33:21,558 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-10-26 19:33:21,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:21,558 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-26 19:33:21,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:33:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-26 19:33:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 19:33:21,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:21,560 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:21,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:33:21,560 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:21,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:21,561 INFO L82 PathProgramCache]: Analyzing trace with hash -446889165, now seen corresponding path program 1 times [2020-10-26 19:33:21,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:21,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966999893] [2020-10-26 19:33:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:21,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:21,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:21,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:22,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:22,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:33:22,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:22,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 729 [2020-10-26 19:33:22,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:22,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:33:22,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:22,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:33:22,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:33:22,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:22,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:22,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:22,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:22,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:22,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:33:22,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:22,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:22,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:22,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:22,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:33:22,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966999893] [2020-10-26 19:33:22,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:22,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:33:22,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627236690] [2020-10-26 19:33:22,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:33:22,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:22,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:33:22,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:33:22,431 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-26 19:33:22,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:22,610 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-26 19:33:22,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:33:22,611 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-26 19:33:22,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:22,613 INFO L225 Difference]: With dead ends: 43 [2020-10-26 19:33:22,613 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:33:22,614 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 19:33:22,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:33:22,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-26 19:33:22,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 19:33:22,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-26 19:33:22,629 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2020-10-26 19:33:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:22,629 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-26 19:33:22,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:33:22,630 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-26 19:33:22,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:33:22,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:22,631 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:22,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:33:22,631 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:22,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:22,633 INFO L82 PathProgramCache]: Analyzing trace with hash 505618241, now seen corresponding path program 2 times [2020-10-26 19:33:22,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:22,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384891286] [2020-10-26 19:33:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:22,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:22,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:22,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:23,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:23,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:33:23,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:23,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-10-26 19:33:23,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:23,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:33:23,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:23,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:33:23,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:23,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:23,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:23,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:23,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:23,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:23,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:33:23,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:23,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:23,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:23,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:23,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:33:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:23,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384891286] [2020-10-26 19:33:23,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:23,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:33:23,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112771568] [2020-10-26 19:33:23,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:33:23,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:23,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:33:23,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:33:23,906 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2020-10-26 19:33:24,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:24,175 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-26 19:33:24,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:33:24,176 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-26 19:33:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:24,178 INFO L225 Difference]: With dead ends: 41 [2020-10-26 19:33:24,178 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 19:33:24,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:33:24,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 19:33:24,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-26 19:33:24,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:33:24,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-26 19:33:24,189 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 21 [2020-10-26 19:33:24,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:24,190 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-26 19:33:24,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:33:24,190 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-26 19:33:24,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:33:24,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:24,191 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:24,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:33:24,191 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:24,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:24,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1957781260, now seen corresponding path program 3 times [2020-10-26 19:33:24,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:24,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631166733] [2020-10-26 19:33:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:24,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:24,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:24,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:25,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:25,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:33:25,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:25,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1135 [2020-10-26 19:33:25,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:25,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:33:25,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:25,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:33:25,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:25,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:25,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:25,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:25,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:25,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:25,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:25,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:25,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:25,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:25,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:25,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:25,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631166733] [2020-10-26 19:33:25,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:25,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:33:25,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765026277] [2020-10-26 19:33:25,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:33:25,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:25,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:33:25,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:33:25,590 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-10-26 19:33:26,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:26,027 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-26 19:33:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:33:26,028 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-26 19:33:26,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:26,031 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:33:26,032 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:33:26,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:33:26,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:33:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-10-26 19:33:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:33:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-26 19:33:26,055 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 22 [2020-10-26 19:33:26,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:26,056 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-26 19:33:26,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:33:26,057 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-26 19:33:26,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:33:26,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:26,059 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:26,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:33:26,059 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:26,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:26,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1013754463, now seen corresponding path program 4 times [2020-10-26 19:33:26,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:26,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393932576] [2020-10-26 19:33:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:26,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:26,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:26,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:27,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:27,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:33:27,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:27,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1354 [2020-10-26 19:33:27,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:27,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:33:27,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:27,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:33:27,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:27,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:27,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:27,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:27,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:27,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:27,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:33:27,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:27,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:27,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:27,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:27,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:27,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393932576] [2020-10-26 19:33:27,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:27,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:33:27,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593158770] [2020-10-26 19:33:27,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:33:27,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:27,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:33:27,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:33:27,526 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 7 states. [2020-10-26 19:33:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:27,668 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-10-26 19:33:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:33:27,671 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-26 19:33:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:27,672 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:33:27,672 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:33:27,673 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 19:33:27,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:33:27,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-26 19:33:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:33:27,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-26 19:33:27,689 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 23 [2020-10-26 19:33:27,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:27,690 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-26 19:33:27,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:33:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-26 19:33:27,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:33:27,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:27,691 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:27,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:33:27,692 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:27,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:27,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1714546989, now seen corresponding path program 5 times [2020-10-26 19:33:27,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:27,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475954024] [2020-10-26 19:33:27,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:27,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:27,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:28,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:29,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:29,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:33:29,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:29,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1470 [2020-10-26 19:33:29,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:29,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:33:29,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:29,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:33:29,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:29,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:29,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:29,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:29,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:29,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:29,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:33:29,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:29,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:29,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:29,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:29,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:29,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475954024] [2020-10-26 19:33:29,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:29,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:33:29,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258587183] [2020-10-26 19:33:29,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:33:29,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:29,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:33:29,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:33:29,277 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 8 states. [2020-10-26 19:33:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:29,380 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-26 19:33:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:33:29,380 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-26 19:33:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:29,381 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:33:29,381 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:33:29,383 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 19:33:29,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:33:29,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-26 19:33:29,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:33:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-26 19:33:29,397 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2020-10-26 19:33:29,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:29,397 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-26 19:33:29,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:33:29,397 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-26 19:33:29,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:33:29,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:29,399 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:29,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:33:29,400 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:29,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:29,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1964278815, now seen corresponding path program 6 times [2020-10-26 19:33:29,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:29,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866314352] [2020-10-26 19:33:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:29,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:29,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:29,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:31,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:31,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:33:31,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:31,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1703 [2020-10-26 19:33:31,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:31,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:33:31,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:31,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:33:31,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:31,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:31,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:31,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:31,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:31,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:31,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:31,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:31,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:31,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:31,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:31,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:31,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866314352] [2020-10-26 19:33:31,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:31,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:33:31,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170025553] [2020-10-26 19:33:31,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:33:31,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:31,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:33:31,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:33:31,241 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2020-10-26 19:33:31,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:31,374 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-26 19:33:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:33:31,375 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-26 19:33:31,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:31,376 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:33:31,376 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:33:31,377 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 19:33:31,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:33:31,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-26 19:33:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:33:31,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-26 19:33:31,391 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 25 [2020-10-26 19:33:31,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:31,392 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-26 19:33:31,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:33:31,392 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-26 19:33:31,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:33:31,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:31,393 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:31,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:33:31,393 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:31,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:31,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1116030829, now seen corresponding path program 7 times [2020-10-26 19:33:31,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:31,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075481999] [2020-10-26 19:33:31,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:31,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:31,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:31,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:33,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:33,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:33:33,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:33,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1908 [2020-10-26 19:33:33,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:33,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:33:33,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:33,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:33:33,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:33,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:33,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:33,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:33,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:33,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:33,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:33:33,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:33,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:33,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:33,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:33,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 19:33:33,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075481999] [2020-10-26 19:33:33,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:33,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:33:33,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129355846] [2020-10-26 19:33:33,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:33:33,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:33,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:33:33,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:33:33,540 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 12 states. [2020-10-26 19:33:33,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:33,925 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-26 19:33:33,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:33:33,925 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-26 19:33:33,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:33,926 INFO L225 Difference]: With dead ends: 48 [2020-10-26 19:33:33,926 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:33:33,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:33:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:33:33,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-10-26 19:33:33,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:33:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-26 19:33:33,935 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-10-26 19:33:33,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:33,935 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-26 19:33:33,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:33:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-26 19:33:33,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:33:33,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:33,937 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:33,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:33:33,937 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:33,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:33,938 INFO L82 PathProgramCache]: Analyzing trace with hash -248242047, now seen corresponding path program 1 times [2020-10-26 19:33:33,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:33,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961352326] [2020-10-26 19:33:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:33,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:33,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:34,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:34,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:33:34,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:34,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-26 19:33:34,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:34,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:33:34,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:34,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:33:34,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:34,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:34,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:34,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:34,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:34,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:34,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:34,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:34,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:34,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:34,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:34,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:34,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-26 19:33:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:34,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:34,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:34,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:34,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:34,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:34,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:34,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:34,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:34,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:34,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:33:34,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961352326] [2020-10-26 19:33:34,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:34,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:33:34,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962059343] [2020-10-26 19:33:34,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:33:34,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:34,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:33:34,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:33:34,579 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 10 states. [2020-10-26 19:33:34,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:34,702 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-10-26 19:33:34,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:33:34,703 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-26 19:33:34,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:34,704 INFO L225 Difference]: With dead ends: 57 [2020-10-26 19:33:34,704 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:33:34,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:33:34,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:33:34,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-26 19:33:34,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:33:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-26 19:33:34,712 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2020-10-26 19:33:34,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:34,712 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-26 19:33:34,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:33:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-26 19:33:34,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:33:34,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:34,714 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:34,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:33:34,714 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:34,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:34,715 INFO L82 PathProgramCache]: Analyzing trace with hash 2054918067, now seen corresponding path program 2 times [2020-10-26 19:33:34,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:34,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163754157] [2020-10-26 19:33:34,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:34,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:34,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:35,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:33:35,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:35,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 675 [2020-10-26 19:33:35,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:35,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:33:35,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:35,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:33:35,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:35,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:35,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:35,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:35,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:35,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:35,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:35,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:35,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:35,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:35,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:35,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 19:33:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:35,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:35,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:35,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:35,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:35,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:35,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:35,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:35,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:35,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:33:35,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163754157] [2020-10-26 19:33:35,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:35,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:33:35,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702427781] [2020-10-26 19:33:35,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:33:35,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:35,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:33:35,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:33:35,533 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states. [2020-10-26 19:33:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:35,687 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-10-26 19:33:35,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:33:35,688 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-26 19:33:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:35,689 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:33:35,689 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 19:33:35,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:33:35,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 19:33:35,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-10-26 19:33:35,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:33:35,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-26 19:33:35,698 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2020-10-26 19:33:35,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:35,698 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-26 19:33:35,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:33:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-26 19:33:35,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:33:35,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:35,699 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:35,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:33:35,700 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:35,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1529217618, now seen corresponding path program 3 times [2020-10-26 19:33:35,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:35,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735856269] [2020-10-26 19:33:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:35,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:38,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:38,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:33:38,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:38,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2712 [2020-10-26 19:33:38,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:38,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:33:38,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:38,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:33:38,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:38,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:38,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:38,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:38,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:38,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:38,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:33:38,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:38,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:38,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:38,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:38,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:38,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 19:33:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:38,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:38,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:38,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:38,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:38,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:38,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:38,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:33:38,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:38,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:33:38,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 19:33:38,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735856269] [2020-10-26 19:33:38,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:38,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:33:38,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168151835] [2020-10-26 19:33:38,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:33:38,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:38,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:33:38,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:33:38,684 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 12 states. [2020-10-26 19:33:39,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:39,023 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-10-26 19:33:39,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:33:39,024 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-26 19:33:39,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:39,025 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:33:39,025 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:33:39,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:33:39,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:33:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-10-26 19:33:39,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:33:39,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-26 19:33:39,039 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 34 [2020-10-26 19:33:39,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:39,039 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-26 19:33:39,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:33:39,039 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-26 19:33:39,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:33:39,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:39,041 INFO L422 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:39,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:33:39,042 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:39,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:39,042 INFO L82 PathProgramCache]: Analyzing trace with hash 983660769, now seen corresponding path program 4 times [2020-10-26 19:33:39,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:39,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628004956] [2020-10-26 19:33:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:39,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:39,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:39,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:42,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:42,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:33:42,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:42,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3252 [2020-10-26 19:33:42,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:42,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:33:42,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:42,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:33:42,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:42,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:42,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:42,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:42,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:42,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:42,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:42,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:42,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:42,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:42,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:42,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:42,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 19:33:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:42,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:42,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:42,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:42,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:42,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:42,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:42,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:42,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:42,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:42,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:33:42,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628004956] [2020-10-26 19:33:42,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:42,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:33:42,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029245960] [2020-10-26 19:33:42,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:33:42,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:42,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:33:42,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:33:42,474 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 12 states. [2020-10-26 19:33:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:42,639 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-10-26 19:33:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:33:42,640 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-26 19:33:42,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:42,641 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:33:42,641 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:33:42,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 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 19:33:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:33:42,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-10-26 19:33:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:33:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-26 19:33:42,659 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 35 [2020-10-26 19:33:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:42,660 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-26 19:33:42,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:33:42,660 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-26 19:33:42,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:33:42,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:42,664 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:42,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:33:42,664 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:42,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:42,665 INFO L82 PathProgramCache]: Analyzing trace with hash -413532397, now seen corresponding path program 5 times [2020-10-26 19:33:42,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:42,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932768092] [2020-10-26 19:33:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:42,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:42,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:42,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:45,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:45,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:33:45,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:45,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3275 [2020-10-26 19:33:45,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:45,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:33:45,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:45,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:33:45,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:46,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:46,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:46,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:46,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:46,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:46,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:46,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:46,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:46,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:46,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:46,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:46,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:33:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:46,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:46,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:46,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:46,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:46,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:46,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:46,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:46,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:46,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:46,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 19:33:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:33:46,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932768092] [2020-10-26 19:33:46,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:46,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:33:46,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592514766] [2020-10-26 19:33:46,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:33:46,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:46,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:33:46,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:33:46,137 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 13 states. [2020-10-26 19:33:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:46,298 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2020-10-26 19:33:46,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:33:46,299 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-26 19:33:46,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:46,300 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:33:46,300 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:33:46,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 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 19:33:46,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:33:46,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-26 19:33:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:33:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-26 19:33:46,310 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 36 [2020-10-26 19:33:46,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:46,310 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-26 19:33:46,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:33:46,310 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-26 19:33:46,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:33:46,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:46,311 INFO L422 BasicCegarLoop]: trace histogram [10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:46,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:33:46,311 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:46,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:46,312 INFO L82 PathProgramCache]: Analyzing trace with hash -776847583, now seen corresponding path program 6 times [2020-10-26 19:33:46,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:46,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289141256] [2020-10-26 19:33:46,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:46,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:46,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:46,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:49,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:49,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:33:49,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:49,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3345 [2020-10-26 19:33:49,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:49,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:33:49,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:49,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:33:49,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:49,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:49,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:49,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:49,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:49,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:49,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:49,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:49,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:49,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:49,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:49,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:49,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-26 19:33:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:49,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:49,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:49,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:49,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:49,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:49,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:49,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:49,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:49,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:49,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:33:49,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289141256] [2020-10-26 19:33:49,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:49,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:33:49,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903023991] [2020-10-26 19:33:49,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:33:49,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:49,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:33:49,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:33:49,842 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 14 states. [2020-10-26 19:33:50,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:50,016 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2020-10-26 19:33:50,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:33:50,017 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-26 19:33:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:50,018 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:33:50,018 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:33:50,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 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 19:33:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:33:50,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-10-26 19:33:50,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:33:50,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-26 19:33:50,029 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 37 [2020-10-26 19:33:50,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:50,029 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-26 19:33:50,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:33:50,030 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-26 19:33:50,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:33:50,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:50,031 INFO L422 BasicCegarLoop]: trace histogram [11, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:50,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:33:50,031 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:50,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:50,032 INFO L82 PathProgramCache]: Analyzing trace with hash 845283539, now seen corresponding path program 7 times [2020-10-26 19:33:50,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:50,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16452953] [2020-10-26 19:33:50,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:50,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:50,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:50,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:53,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:53,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:33:53,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:53,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3153 [2020-10-26 19:33:53,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:53,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:33:53,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:53,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:33:53,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:53,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:53,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:53,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:53,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:53,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:53,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:53,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:53,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:53,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:53,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:53,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:53,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 19:33:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:53,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:53,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:53,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:53,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:53,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:53,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:53,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:53,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:53,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:53,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:33:53,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16452953] [2020-10-26 19:33:53,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:53,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:33:53,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764008046] [2020-10-26 19:33:53,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:33:53,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:53,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:33:53,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:33:53,390 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 15 states. [2020-10-26 19:33:53,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:53,532 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2020-10-26 19:33:53,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:33:53,533 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-26 19:33:53,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:53,534 INFO L225 Difference]: With dead ends: 89 [2020-10-26 19:33:53,534 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:33:53,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:33:53,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:33:53,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-10-26 19:33:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:33:53,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-26 19:33:53,546 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 38 [2020-10-26 19:33:53,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:53,546 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-26 19:33:53,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:33:53,546 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-26 19:33:53,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:33:53,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:53,547 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:53,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:33:53,547 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:53,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:53,548 INFO L82 PathProgramCache]: Analyzing trace with hash -408259231, now seen corresponding path program 8 times [2020-10-26 19:33:53,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:53,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370129350] [2020-10-26 19:33:53,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:53,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:53,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:53,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:57,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:57,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:33:57,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:57,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3888 [2020-10-26 19:33:57,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:33:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:33:57,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:57,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:57,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:57,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:57,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:57,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:57,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:57,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:57,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:57,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:57,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:57,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:57,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-26 19:33:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:57,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:57,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:57,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:57,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:57,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:57,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:57,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:33:57,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:57,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:33:57,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-26 19:33:57,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370129350] [2020-10-26 19:33:57,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:57,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:33:57,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157561299] [2020-10-26 19:33:57,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:33:57,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:57,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:33:57,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:33:57,714 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 13 states. [2020-10-26 19:33:58,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:58,225 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-26 19:33:58,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:33:58,226 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-26 19:33:58,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:58,228 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:33:58,228 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:33:58,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:33:58,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:33:58,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2020-10-26 19:33:58,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:33:58,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-26 19:33:58,240 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 39 [2020-10-26 19:33:58,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:58,241 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-26 19:33:58,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:33:58,241 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-26 19:33:58,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:33:58,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:58,241 INFO L422 BasicCegarLoop]: trace histogram [12, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:58,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:33:58,242 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:58,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:58,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1051420594, now seen corresponding path program 9 times [2020-10-26 19:33:58,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:58,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517254425] [2020-10-26 19:33:58,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:58,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:58,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:58,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:01,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:01,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:34:01,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:01,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3305 [2020-10-26 19:34:01,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:01,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:34:01,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:01,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:34:01,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:01,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:01,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:01,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:01,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:01,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:01,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:01,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:01,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:01,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:01,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:01,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:01,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 19:34:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:01,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:01,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:01,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:01,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:01,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:01,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:01,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:01,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:01,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:01,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:34:01,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517254425] [2020-10-26 19:34:01,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:01,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:34:01,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348483292] [2020-10-26 19:34:01,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:34:01,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:01,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:34:01,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:34:01,787 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 16 states. [2020-10-26 19:34:02,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:02,016 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2020-10-26 19:34:02,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:34:02,017 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-26 19:34:02,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:02,018 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:34:02,018 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:34:02,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 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 19:34:02,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:34:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-10-26 19:34:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:34:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-26 19:34:02,029 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 40 [2020-10-26 19:34:02,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:02,030 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-26 19:34:02,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:34:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-26 19:34:02,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:34:02,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:02,031 INFO L422 BasicCegarLoop]: trace histogram [13, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:02,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:34:02,031 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:02,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1012338496, now seen corresponding path program 10 times [2020-10-26 19:34:02,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:02,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668703426] [2020-10-26 19:34:02,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:02,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:02,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:02,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:05,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:05,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:34:05,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:05,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3511 [2020-10-26 19:34:05,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:05,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:34:05,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:05,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:34:05,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:05,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:05,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:05,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:05,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:05,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:05,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:05,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:05,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:05,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:05,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:05,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:05,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 19:34:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:05,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:05,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:05,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:05,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:05,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:05,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:05,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:05,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:05,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:05,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:34:05,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668703426] [2020-10-26 19:34:05,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:05,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:34:05,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450720232] [2020-10-26 19:34:05,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:34:05,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:05,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:34:05,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:34:05,802 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 17 states. [2020-10-26 19:34:06,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:06,056 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2020-10-26 19:34:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:34:06,058 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-26 19:34:06,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:06,059 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:34:06,059 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:34:06,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 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 19:34:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:34:06,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-10-26 19:34:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:34:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-26 19:34:06,077 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 41 [2020-10-26 19:34:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:06,077 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-26 19:34:06,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:34:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-26 19:34:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:34:06,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:06,078 INFO L422 BasicCegarLoop]: trace histogram [14, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:06,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:34:06,078 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:06,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:06,079 INFO L82 PathProgramCache]: Analyzing trace with hash -564360846, now seen corresponding path program 11 times [2020-10-26 19:34:06,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:06,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920961220] [2020-10-26 19:34:06,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:06,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:06,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:06,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:09,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:09,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:34:09,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:09,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3747 [2020-10-26 19:34:09,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:09,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:34:09,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:09,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:34:09,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:10,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:10,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:10,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:10,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:10,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:10,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:10,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:10,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:10,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:10,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:10,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:10,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:34:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:10,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:10,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:10,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:10,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:10,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:10,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:10,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:10,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:10,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:10,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:34:10,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920961220] [2020-10-26 19:34:10,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:10,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:34:10,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032376230] [2020-10-26 19:34:10,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:34:10,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:10,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:34:10,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:34:10,101 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 18 states. [2020-10-26 19:34:10,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:10,271 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2020-10-26 19:34:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:34:10,271 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-26 19:34:10,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:10,272 INFO L225 Difference]: With dead ends: 97 [2020-10-26 19:34:10,272 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:34:10,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 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 19:34:10,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:34:10,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2020-10-26 19:34:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:34:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-26 19:34:10,288 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 42 [2020-10-26 19:34:10,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:10,290 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-26 19:34:10,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:34:10,290 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-26 19:34:10,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:34:10,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:10,292 INFO L422 BasicCegarLoop]: trace histogram [15, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:10,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:34:10,292 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:10,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:10,292 INFO L82 PathProgramCache]: Analyzing trace with hash 438044416, now seen corresponding path program 12 times [2020-10-26 19:34:10,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:10,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302329255] [2020-10-26 19:34:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:10,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:10,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:11,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:15,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:15,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:34:15,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:15,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:34:15,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:15,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:34:15,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:15,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:34:15,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:15,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:15,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:15,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:15,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:15,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:15,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:34:15,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:15,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:15,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:15,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:15,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:34:15,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 19:34:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:15,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:15,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:15,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:15,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:15,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:15,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:15,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:15,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:15,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:15,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 2 proven. 120 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:34:15,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302329255] [2020-10-26 19:34:15,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:15,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:34:15,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246975130] [2020-10-26 19:34:15,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:34:15,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:15,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:34:15,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:34:15,669 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 19 states. [2020-10-26 19:34:16,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:16,012 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2020-10-26 19:34:16,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:34:16,012 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-26 19:34:16,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:16,014 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:34:16,014 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:34:16,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 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 19:34:16,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:34:16,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2020-10-26 19:34:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:34:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-26 19:34:16,033 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 43 [2020-10-26 19:34:16,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:16,033 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-26 19:34:16,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:34:16,033 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-26 19:34:16,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 19:34:16,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:16,034 INFO L422 BasicCegarLoop]: trace histogram [16, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:16,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:34:16,034 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:16,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:16,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1447836466, now seen corresponding path program 13 times [2020-10-26 19:34:16,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:16,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514708151] [2020-10-26 19:34:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:16,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:16,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:16,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:20,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:20,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:34:20,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:20,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4841 [2020-10-26 19:34:20,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:20,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:34:20,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:20,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:34:20,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:21,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:21,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:21,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:21,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:21,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:21,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:21,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:21,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:21,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:21,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:21,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:21,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:34:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:21,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:21,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:21,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:21,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:21,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:21,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:21,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:21,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:21,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:21,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 2 proven. 136 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:34:21,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514708151] [2020-10-26 19:34:21,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:21,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:34:21,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991961662] [2020-10-26 19:34:21,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:34:21,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:21,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:34:21,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:34:21,191 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 20 states. [2020-10-26 19:34:21,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:21,443 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2020-10-26 19:34:21,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:34:21,444 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-26 19:34:21,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:21,445 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:34:21,445 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:34:21,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:34:21,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:34:21,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2020-10-26 19:34:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:34:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-26 19:34:21,457 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 44 [2020-10-26 19:34:21,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:21,457 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-26 19:34:21,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:34:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-26 19:34:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:34:21,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:21,458 INFO L422 BasicCegarLoop]: trace histogram [17, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:21,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:34:21,459 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:21,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:21,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1608348352, now seen corresponding path program 14 times [2020-10-26 19:34:21,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:21,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363101563] [2020-10-26 19:34:21,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:21,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:21,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:22,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:26,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:26,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:34:26,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:26,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:34:26,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:26,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:34:26,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:26,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:34:26,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:26,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:26,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:26,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:26,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:26,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:26,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:26,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:26,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:26,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:26,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:26,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:26,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-26 19:34:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:26,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:26,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:26,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:26,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:26,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:26,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:26,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:26,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:26,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:26,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-26 19:34:26,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363101563] [2020-10-26 19:34:26,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:26,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:34:26,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547689076] [2020-10-26 19:34:26,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:34:26,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:26,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:34:26,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:34:26,765 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 14 states. [2020-10-26 19:34:27,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:27,248 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-10-26 19:34:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:34:27,248 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-26 19:34:27,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:27,249 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:34:27,249 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:34:27,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:34:27,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:34:27,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-26 19:34:27,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:34:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-26 19:34:27,273 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 45 [2020-10-26 19:34:27,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:27,273 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-26 19:34:27,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:34:27,273 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-26 19:34:27,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:34:27,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:27,274 INFO L422 BasicCegarLoop]: trace histogram [17, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:27,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:34:27,274 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:27,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:27,275 INFO L82 PathProgramCache]: Analyzing trace with hash 656885025, now seen corresponding path program 15 times [2020-10-26 19:34:27,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:27,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426003930] [2020-10-26 19:34:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:27,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:27,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:28,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:31,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:31,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:34:31,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:31,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4650 [2020-10-26 19:34:31,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:31,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:34:31,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:31,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:34:31,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:32,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:32,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:32,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:32,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:32,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:32,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:32,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:32,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:32,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:32,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:32,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:32,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:34:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:32,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:32,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:32,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:32,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:32,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:34:32,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:32,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:32,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:32,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:32,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:32,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:34:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:32,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:32,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:32,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:32,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:32,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:32,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:32,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:32,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:32,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:32,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 4 proven. 153 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 19:34:32,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426003930] [2020-10-26 19:34:32,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:32,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:34:32,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089283918] [2020-10-26 19:34:32,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:34:32,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:32,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:34:32,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:34:32,280 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 21 states. [2020-10-26 19:34:32,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:32,530 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-10-26 19:34:32,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:34:32,531 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-26 19:34:32,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:32,532 INFO L225 Difference]: With dead ends: 89 [2020-10-26 19:34:32,532 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:34:32,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 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 19:34:32,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:34:32,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-10-26 19:34:32,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:34:32,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-26 19:34:32,545 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2020-10-26 19:34:32,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:32,545 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-26 19:34:32,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:34:32,545 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-26 19:34:32,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:34:32,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:32,547 INFO L422 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:32,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:34:32,549 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:32,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:32,549 INFO L82 PathProgramCache]: Analyzing trace with hash 255928147, now seen corresponding path program 16 times [2020-10-26 19:34:32,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:32,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034565303] [2020-10-26 19:34:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:32,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:32,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:34,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:37,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:37,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:34:37,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:37,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4620 [2020-10-26 19:34:37,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:37,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:34:37,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:37,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:34:37,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:37,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:37,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:37,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:37,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:37,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:37,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:37,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:37,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:37,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:37,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:37,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:37,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-26 19:34:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:37,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:37,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:37,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:37,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:37,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:37,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:37,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:37,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:37,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:37,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:37,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:34:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:37,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:37,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:37,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:37,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:37,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:37,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:37,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 19:34:37,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034565303] [2020-10-26 19:34:37,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:37,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:34:37,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344317380] [2020-10-26 19:34:37,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:34:37,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:37,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:34:37,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:34:37,567 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2020-10-26 19:34:37,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:37,801 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2020-10-26 19:34:37,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:34:37,802 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-26 19:34:37,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:37,802 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:34:37,803 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:34:37,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 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 19:34:37,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:34:37,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-10-26 19:34:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:34:37,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-26 19:34:37,815 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-10-26 19:34:37,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:37,815 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-26 19:34:37,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:34:37,816 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-26 19:34:37,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:34:37,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:37,817 INFO L422 BasicCegarLoop]: trace histogram [19, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:37,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:34:37,817 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:37,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:37,818 INFO L82 PathProgramCache]: Analyzing trace with hash 711166817, now seen corresponding path program 17 times [2020-10-26 19:34:37,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:37,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604054751] [2020-10-26 19:34:37,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:37,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:37,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:39,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:42,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:42,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:34:42,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:42,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4988 [2020-10-26 19:34:42,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:42,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:34:42,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:42,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:34:42,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:43,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:43,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:43,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:43,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:43,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:43,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:43,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:43,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:43,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:43,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:43,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:43,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:34:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:43,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:43,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:43,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:43,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:43,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:34:43,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:43,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:43,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:43,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:43,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:43,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:34:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:43,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:43,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:43,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:43,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:43,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:34:43,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:43,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:43,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:43,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:43,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 19:34:43,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604054751] [2020-10-26 19:34:43,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:43,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:34:43,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842091241] [2020-10-26 19:34:43,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:34:43,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:43,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:34:43,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:34:43,175 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 23 states. [2020-10-26 19:34:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:43,495 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2020-10-26 19:34:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:34:43,496 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-26 19:34:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:43,497 INFO L225 Difference]: With dead ends: 95 [2020-10-26 19:34:43,497 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:34:43,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 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 19:34:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:34:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2020-10-26 19:34:43,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:34:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-26 19:34:43,507 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2020-10-26 19:34:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:43,507 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-26 19:34:43,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:34:43,507 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-26 19:34:43,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:34:43,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:43,508 INFO L422 BasicCegarLoop]: trace histogram [20, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:43,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:34:43,508 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:43,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:43,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1513669726, now seen corresponding path program 18 times [2020-10-26 19:34:43,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:43,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076490661] [2020-10-26 19:34:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:43,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:43,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:45,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:48,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:48,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:34:48,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:48,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:34:48,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:48,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:34:48,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:48,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-26 19:34:48,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:48,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:48,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:48,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:48,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:48,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:48,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:48,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:48,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:48,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:48,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:48,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:48,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:34:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:48,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:48,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:48,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:48,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:48,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:48,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:48,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:48,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:48,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:48,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:48,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:34:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:48,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:48,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:48,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:48,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:48,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:48,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:48,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:48,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:48,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:48,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2020-10-26 19:34:48,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076490661] [2020-10-26 19:34:48,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:48,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:34:48,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026700490] [2020-10-26 19:34:48,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:34:48,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:48,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:34:48,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:34:48,868 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-10-26 19:34:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:49,384 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-10-26 19:34:49,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:34:49,384 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-10-26 19:34:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:49,386 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:34:49,386 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:34:49,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:34:49,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:34:49,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-10-26 19:34:49,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:34:49,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-10-26 19:34:49,399 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-10-26 19:34:49,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:49,399 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-10-26 19:34:49,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:34:49,400 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-10-26 19:34:49,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:34:49,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:49,400 INFO L422 BasicCegarLoop]: trace histogram [20, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:49,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:34:49,401 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:49,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:49,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1161823501, now seen corresponding path program 19 times [2020-10-26 19:34:49,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:49,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558375601] [2020-10-26 19:34:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:49,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:49,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:52,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:54,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:54,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:34:54,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:54,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:34:54,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:54,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:34:54,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:54,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:34:54,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:54,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:54,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:54,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:54,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:54,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:54,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:54,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:54,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:54,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:54,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:54,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:54,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 19:34:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:54,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:54,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:54,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:54,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:54,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:54,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:54,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:54,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:54,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:54,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:54,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:34:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:54,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:54,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:54,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:54,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:54,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:54,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:54,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:54,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:54,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:54,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 4 proven. 210 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 19:34:54,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558375601] [2020-10-26 19:34:54,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:54,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:34:54,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14827397] [2020-10-26 19:34:54,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:34:54,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:54,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:34:54,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:34:54,846 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 24 states. [2020-10-26 19:34:55,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:55,066 INFO L93 Difference]: Finished difference Result 125 states and 137 transitions. [2020-10-26 19:34:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:34:55,070 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-26 19:34:55,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:55,071 INFO L225 Difference]: With dead ends: 125 [2020-10-26 19:34:55,071 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:34:55,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 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 19:34:55,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:34:55,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2020-10-26 19:34:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:34:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-10-26 19:34:55,084 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 56 [2020-10-26 19:34:55,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:55,085 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-10-26 19:34:55,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:34:55,085 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-10-26 19:34:55,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:34:55,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:55,086 INFO L422 BasicCegarLoop]: trace histogram [21, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:55,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:34:55,086 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:55,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:55,087 INFO L82 PathProgramCache]: Analyzing trace with hash -153769983, now seen corresponding path program 20 times [2020-10-26 19:34:55,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:55,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977526365] [2020-10-26 19:34:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:55,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:55,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:58,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:00,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:00,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:35:00,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:35:00,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:35:00,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:00,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:35:00,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:00,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-26 19:35:00,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:00,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:00,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:00,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:00,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:00,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:00,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:00,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:00,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:00,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:00,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:00,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:00,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:35:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:00,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:00,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:00,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:00,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:00,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:00,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:00,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:00,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:00,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:00,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:00,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 19:35:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:00,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:00,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:00,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:00,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:00,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:00,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:00,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:00,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:00,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:00,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-10-26 19:35:00,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977526365] [2020-10-26 19:35:00,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:00,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:35:00,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830315811] [2020-10-26 19:35:00,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:35:00,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:00,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:35:00,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:35:00,453 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand 16 states. [2020-10-26 19:35:01,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:01,180 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-10-26 19:35:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:35:01,183 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-10-26 19:35:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:01,184 INFO L225 Difference]: With dead ends: 85 [2020-10-26 19:35:01,184 INFO L226 Difference]: Without dead ends: 81 [2020-10-26 19:35:01,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:35:01,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-26 19:35:01,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2020-10-26 19:35:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:35:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-26 19:35:01,195 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 57 [2020-10-26 19:35:01,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:01,195 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-26 19:35:01,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:35:01,196 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-26 19:35:01,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:35:01,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:01,196 INFO L422 BasicCegarLoop]: trace histogram [21, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:01,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:35:01,197 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:01,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:01,197 INFO L82 PathProgramCache]: Analyzing trace with hash -488174784, now seen corresponding path program 21 times [2020-10-26 19:35:01,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:01,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248808029] [2020-10-26 19:35:01,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:01,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:01,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:03,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:06,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:06,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:35:06,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:35:06,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:35:06,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:06,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:35:06,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:06,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-26 19:35:06,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:06,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:06,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:06,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:06,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:06,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:06,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:06,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:06,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:06,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:06,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:06,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:06,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 19:35:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:06,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:06,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:06,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:06,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:06,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:06,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:06,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:06,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:06,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:06,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:06,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:35:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:06,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:06,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:06,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:06,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:06,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:06,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:06,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:06,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:06,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:06,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:06,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:35:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:06,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:06,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:06,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:06,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:06,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:06,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:06,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:06,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:06,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:06,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-10-26 19:35:06,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248808029] [2020-10-26 19:35:06,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:06,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:35:06,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281166583] [2020-10-26 19:35:06,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:35:06,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:06,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:35:06,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:35:06,562 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 16 states. [2020-10-26 19:35:07,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:07,198 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2020-10-26 19:35:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:35:07,199 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-26 19:35:07,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:07,201 INFO L225 Difference]: With dead ends: 91 [2020-10-26 19:35:07,201 INFO L226 Difference]: Without dead ends: 87 [2020-10-26 19:35:07,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:35:07,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-26 19:35:07,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-10-26 19:35:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:35:07,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-10-26 19:35:07,224 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 63 [2020-10-26 19:35:07,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:07,224 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-10-26 19:35:07,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:35:07,224 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-10-26 19:35:07,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:35:07,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:07,225 INFO L422 BasicCegarLoop]: trace histogram [21, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:07,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:35:07,226 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:07,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:07,226 INFO L82 PathProgramCache]: Analyzing trace with hash -559965325, now seen corresponding path program 22 times [2020-10-26 19:35:07,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:07,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892264395] [2020-10-26 19:35:07,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:07,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:07,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:10,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:12,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:12,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:35:12,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:35:12,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:35:12,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:12,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:35:12,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:12,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:35:12,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:12,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:12,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:12,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:12,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:12,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:12,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:35:12,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:12,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:12,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:12,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:12,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:12,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:35:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:12,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:12,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:12,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:12,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:12,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:12,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:12,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:12,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:12,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:12,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:12,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 19:35:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:12,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:12,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:12,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:12,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:12,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:12,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:12,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:12,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:12,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:12,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:12,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:35:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:12,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:12,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:12,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:12,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:12,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:12,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:12,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:12,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:12,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:12,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 6 proven. 231 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:35:12,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892264395] [2020-10-26 19:35:12,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:12,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:35:12,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482168699] [2020-10-26 19:35:12,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:35:12,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:12,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:35:12,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:35:12,735 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 25 states. [2020-10-26 19:35:13,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:13,059 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2020-10-26 19:35:13,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:35:13,062 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-10-26 19:35:13,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:13,064 INFO L225 Difference]: With dead ends: 143 [2020-10-26 19:35:13,064 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:35:13,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 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 19:35:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:35:13,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-10-26 19:35:13,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:35:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2020-10-26 19:35:13,087 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 64 [2020-10-26 19:35:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:13,087 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2020-10-26 19:35:13,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:35:13,087 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2020-10-26 19:35:13,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:35:13,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:13,088 INFO L422 BasicCegarLoop]: trace histogram [22, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:13,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:35:13,089 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:13,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:13,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1871291775, now seen corresponding path program 23 times [2020-10-26 19:35:13,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:13,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616994770] [2020-10-26 19:35:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:13,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:13,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:16,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:18,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:18,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:35:18,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:35:18,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:35:18,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:18,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:35:18,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:18,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:35:18,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:18,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:18,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:18,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:18,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:18,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:18,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:18,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:18,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:18,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:18,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:18,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:18,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:35:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:18,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:18,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:18,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:18,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:18,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:18,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:18,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:18,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:18,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:18,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:18,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:35:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:18,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:18,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:18,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:18,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:18,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:18,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:18,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:18,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:18,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:18,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:18,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:35:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:18,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:18,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:18,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:18,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:18,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:18,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:18,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:18,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:18,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:18,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 6 proven. 253 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:35:18,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616994770] [2020-10-26 19:35:18,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:18,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:35:18,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837827728] [2020-10-26 19:35:18,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:35:18,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:18,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:35:18,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:35:18,607 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 26 states. [2020-10-26 19:35:18,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:18,948 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2020-10-26 19:35:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:35:18,949 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 65 [2020-10-26 19:35:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:18,949 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:35:18,950 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:35:18,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 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 19:35:18,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:35:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-10-26 19:35:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:35:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-10-26 19:35:18,965 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 65 [2020-10-26 19:35:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:18,965 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-10-26 19:35:18,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:35:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-10-26 19:35:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:35:18,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:18,966 INFO L422 BasicCegarLoop]: trace histogram [23, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:18,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:35:18,966 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:18,967 INFO L82 PathProgramCache]: Analyzing trace with hash 427261235, now seen corresponding path program 24 times [2020-10-26 19:35:18,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:18,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491803201] [2020-10-26 19:35:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:18,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:19,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:23,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:24,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:24,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:35:24,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:35:24,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:35:24,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:24,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:35:24,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:24,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:35:24,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:24,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:24,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:24,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:24,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:24,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:24,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:24,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:24,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:24,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:24,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:24,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:24,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:35:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:24,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:24,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:24,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:24,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:24,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:24,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:24,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:24,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:24,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:24,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:24,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:35:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:24,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:24,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:24,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:24,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:24,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:24,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:24,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:24,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:24,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:24,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:24,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:35:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:24,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:24,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:24,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:24,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:24,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:24,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:24,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:24,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:24,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:24,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-26 19:35:24,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491803201] [2020-10-26 19:35:24,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:24,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:35:24,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513817330] [2020-10-26 19:35:24,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:35:24,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:24,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:35:24,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:35:24,380 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 17 states. [2020-10-26 19:35:25,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:25,446 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2020-10-26 19:35:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:35:25,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-10-26 19:35:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:25,448 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:35:25,448 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:35:25,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:35:25,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:35:25,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 86. [2020-10-26 19:35:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:35:25,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2020-10-26 19:35:25,463 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 66 [2020-10-26 19:35:25,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:25,463 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2020-10-26 19:35:25,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:35:25,463 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2020-10-26 19:35:25,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:35:25,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:25,464 INFO L422 BasicCegarLoop]: trace histogram [23, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:25,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:35:25,464 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:25,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2048747488, now seen corresponding path program 25 times [2020-10-26 19:35:25,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:25,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945845283] [2020-10-26 19:35:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:25,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:25,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:30,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:30,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:30,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:35:30,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:35:30,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:35:30,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:30,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:35:30,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:30,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:35:30,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:30,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:30,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:30,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:30,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:30,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:30,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:30,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:30,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:30,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:30,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:30,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:30,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:35:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:30,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:31,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:31,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:31,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:31,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:31,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:31,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:31,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:31,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:31,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:31,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:35:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:31,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:31,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:31,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:31,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:31,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:31,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:31,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:31,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:31,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:31,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:31,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:35:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:31,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:31,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:31,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:31,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:31,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:31,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:31,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:31,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:31,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:31,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 6 proven. 276 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:35:31,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945845283] [2020-10-26 19:35:31,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:31,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:35:31,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15504406] [2020-10-26 19:35:31,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:35:31,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:31,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:35:31,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:35:31,014 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 27 states. [2020-10-26 19:35:31,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:31,357 INFO L93 Difference]: Finished difference Result 147 states and 162 transitions. [2020-10-26 19:35:31,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:35:31,358 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 67 [2020-10-26 19:35:31,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:31,359 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:35:31,359 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:35:31,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 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 19:35:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:35:31,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2020-10-26 19:35:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:35:31,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2020-10-26 19:35:31,375 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 67 [2020-10-26 19:35:31,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:31,375 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2020-10-26 19:35:31,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:35:31,376 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2020-10-26 19:35:31,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:35:31,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:31,377 INFO L422 BasicCegarLoop]: trace histogram [24, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:31,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:35:31,377 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:31,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:31,377 INFO L82 PathProgramCache]: Analyzing trace with hash -949967342, now seen corresponding path program 26 times [2020-10-26 19:35:31,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:31,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816559342] [2020-10-26 19:35:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:31,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:31,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:36,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:36,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:35:36,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:36,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:35:36,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:36,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:35:36,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:36,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:35:36,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:36,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:36,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:36,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:36,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:36,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:36,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:35:36,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:36,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:36,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:36,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:36,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:36,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:35:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:36,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:36,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:36,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:36,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:36,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:36,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:36,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:36,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:36,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:36,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:36,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:35:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:36,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:36,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:36,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:36,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:36,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:36,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:36,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:36,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:35:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:36,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:36,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:36,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:36,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:36,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:36,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:36,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:36,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:36,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:36,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 6 proven. 300 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:35:36,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816559342] [2020-10-26 19:35:36,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:36,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:35:36,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886518777] [2020-10-26 19:35:36,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:35:36,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:36,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:35:36,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:35:36,970 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 28 states. [2020-10-26 19:35:37,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:37,245 INFO L93 Difference]: Finished difference Result 148 states and 163 transitions. [2020-10-26 19:35:37,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:35:37,246 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 68 [2020-10-26 19:35:37,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:37,247 INFO L225 Difference]: With dead ends: 148 [2020-10-26 19:35:37,247 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:35:37,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 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 19:35:37,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:35:37,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2020-10-26 19:35:37,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:35:37,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-10-26 19:35:37,263 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 68 [2020-10-26 19:35:37,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:37,263 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-10-26 19:35:37,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:35:37,264 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-10-26 19:35:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:35:37,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:37,265 INFO L422 BasicCegarLoop]: trace histogram [25, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:37,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:35:37,265 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:37,265 INFO L82 PathProgramCache]: Analyzing trace with hash 579153440, now seen corresponding path program 27 times [2020-10-26 19:35:37,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:37,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481147272] [2020-10-26 19:35:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:37,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:37,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:42,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:42,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:35:42,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:42,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:35:42,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:42,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:35:42,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:42,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:35:42,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:42,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:42,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:42,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:42,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:42,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:42,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:42,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:42,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:42,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:42,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:42,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:42,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:35:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:42,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:42,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:42,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:42,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:42,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:42,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:42,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:42,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:42,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:42,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:42,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:35:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:42,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:42,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:42,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:42,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:42,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:42,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:42,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:42,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:42,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:42,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:42,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:35:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:42,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:42,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:42,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:42,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:42,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:42,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:42,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:42,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:42,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:42,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 6 proven. 325 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:35:42,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481147272] [2020-10-26 19:35:42,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:42,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:35:42,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685750558] [2020-10-26 19:35:42,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:35:42,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:42,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:35:42,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:35:42,903 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 29 states. [2020-10-26 19:35:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:43,331 INFO L93 Difference]: Finished difference Result 152 states and 168 transitions. [2020-10-26 19:35:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:35:43,331 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 69 [2020-10-26 19:35:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:43,332 INFO L225 Difference]: With dead ends: 152 [2020-10-26 19:35:43,332 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:35:43,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 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 19:35:43,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:35:43,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2020-10-26 19:35:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:35:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2020-10-26 19:35:43,352 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 69 [2020-10-26 19:35:43,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:43,353 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2020-10-26 19:35:43,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:35:43,353 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2020-10-26 19:35:43,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:35:43,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:43,354 INFO L422 BasicCegarLoop]: trace histogram [26, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:43,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:35:43,354 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:43,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:43,355 INFO L82 PathProgramCache]: Analyzing trace with hash 737257426, now seen corresponding path program 28 times [2020-10-26 19:35:43,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:43,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824343001] [2020-10-26 19:35:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:43,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:43,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:48,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:48,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:35:48,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:48,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:35:48,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:48,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:35:48,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:48,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:35:48,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:49,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:49,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:49,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:49,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:49,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:49,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:35:49,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:49,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:49,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:35:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:49,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:49,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:49,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:49,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:49,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:49,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:49,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:49,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:49,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:49,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:49,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:35:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:49,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:49,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:49,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:49,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:49,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:49,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:49,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:49,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:49,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:49,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:49,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:35:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:49,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:49,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:49,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:49,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:49,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:49,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:49,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:49,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:49,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:49,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 6 proven. 351 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:35:49,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824343001] [2020-10-26 19:35:49,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:49,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:35:49,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130640716] [2020-10-26 19:35:49,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:35:49,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:49,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:35:49,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:35:49,038 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 30 states. [2020-10-26 19:35:49,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:49,440 INFO L93 Difference]: Finished difference Result 153 states and 167 transitions. [2020-10-26 19:35:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:35:49,441 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2020-10-26 19:35:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:49,442 INFO L225 Difference]: With dead ends: 153 [2020-10-26 19:35:49,442 INFO L226 Difference]: Without dead ends: 97 [2020-10-26 19:35:49,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:35:49,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-26 19:35:49,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2020-10-26 19:35:49,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:35:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2020-10-26 19:35:49,458 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 70 [2020-10-26 19:35:49,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:49,458 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2020-10-26 19:35:49,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:35:49,459 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2020-10-26 19:35:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:35:49,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:49,460 INFO L422 BasicCegarLoop]: trace histogram [27, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:49,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:35:49,460 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:49,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1343513696, now seen corresponding path program 29 times [2020-10-26 19:35:49,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:49,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130641296] [2020-10-26 19:35:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:49,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:49,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:54,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:54,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:35:54,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:54,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:35:54,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:54,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:35:54,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:54,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:35:54,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:55,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:55,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:55,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:55,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:55,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:55,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:55,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:55,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:55,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:55,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:55,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:55,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 19:35:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:55,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:55,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:55,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:55,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:55,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:55,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:55,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:55,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:55,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:55,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:55,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:35:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:55,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:55,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:55,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:55,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:55,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:55,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:55,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:55,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:55,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:55,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:55,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:35:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:55,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:55,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:55,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:55,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:55,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:55,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:55,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:55,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:55,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:55,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:35:55,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130641296] [2020-10-26 19:35:55,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:55,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:35:55,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772050730] [2020-10-26 19:35:55,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:35:55,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:55,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:35:55,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:35:55,192 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 31 states. [2020-10-26 19:35:55,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:55,621 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2020-10-26 19:35:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:35:55,624 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2020-10-26 19:35:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:55,625 INFO L225 Difference]: With dead ends: 154 [2020-10-26 19:35:55,625 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:35:55,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 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 19:35:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:35:55,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2020-10-26 19:35:55,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:35:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2020-10-26 19:35:55,641 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 71 [2020-10-26 19:35:55,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:55,641 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2020-10-26 19:35:55,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:35:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2020-10-26 19:35:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:35:55,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:55,643 INFO L422 BasicCegarLoop]: trace histogram [28, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:55,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:35:55,643 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:55,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:55,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1337378414, now seen corresponding path program 30 times [2020-10-26 19:35:55,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:55,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038063743] [2020-10-26 19:35:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:55,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:56,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:00,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:00,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:36:00,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:00,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:36:00,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:00,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:36:00,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:00,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:36:00,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:01,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:01,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:01,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:01,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:01,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:01,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:01,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:01,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:01,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:01,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:01,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:01,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:36:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:01,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:01,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:01,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:01,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:01,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:01,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:01,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:01,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:01,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:01,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:01,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:36:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:01,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:01,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:01,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:01,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:01,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:01,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:01,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:01,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:01,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:01,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:01,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:36:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:01,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:01,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:01,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:01,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:01,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:01,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:01,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:01,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:01,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:01,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 6 proven. 406 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:36:01,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038063743] [2020-10-26 19:36:01,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:01,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:36:01,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440744628] [2020-10-26 19:36:01,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:36:01,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:01,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:36:01,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:36:01,423 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand 32 states. [2020-10-26 19:36:01,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:01,875 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2020-10-26 19:36:01,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:36:01,876 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-26 19:36:01,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:01,876 INFO L225 Difference]: With dead ends: 155 [2020-10-26 19:36:01,876 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:36:01,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:36:01,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:36:01,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-10-26 19:36:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:36:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2020-10-26 19:36:01,889 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 72 [2020-10-26 19:36:01,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:01,890 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2020-10-26 19:36:01,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:36:01,890 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2020-10-26 19:36:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:36:01,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:01,891 INFO L422 BasicCegarLoop]: trace histogram [29, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:01,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:36:01,891 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:01,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:01,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1454312096, now seen corresponding path program 31 times [2020-10-26 19:36:01,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:01,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889148486] [2020-10-26 19:36:01,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:01,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:01,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:06,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:06,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:36:06,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:06,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:36:06,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:06,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:36:06,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:06,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:36:06,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:07,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:07,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:07,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:07,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:07,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:07,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:07,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:07,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:07,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:07,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:07,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:07,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:36:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:07,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:07,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:07,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:07,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:07,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:07,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:07,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:07,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:07,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:07,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:07,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:36:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:07,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:07,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:07,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:07,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:07,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:07,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:07,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:07,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:07,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:07,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:07,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-26 19:36:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:07,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:07,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:07,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:07,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:07,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:07,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:07,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:07,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:07,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:07,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 6 proven. 435 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:36:07,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889148486] [2020-10-26 19:36:07,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:07,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:36:07,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169821884] [2020-10-26 19:36:07,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:36:07,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:07,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:36:07,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:36:07,686 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand 33 states. [2020-10-26 19:36:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:07,959 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2020-10-26 19:36:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:36:07,960 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-10-26 19:36:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:07,961 INFO L225 Difference]: With dead ends: 156 [2020-10-26 19:36:07,961 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:36:07,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 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 19:36:07,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:36:07,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2020-10-26 19:36:07,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:36:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2020-10-26 19:36:07,981 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 73 [2020-10-26 19:36:07,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:07,982 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2020-10-26 19:36:07,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:36:07,982 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2020-10-26 19:36:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:36:07,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:07,983 INFO L422 BasicCegarLoop]: trace histogram [30, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:07,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:36:07,984 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:07,984 INFO L82 PathProgramCache]: Analyzing trace with hash 2097371986, now seen corresponding path program 32 times [2020-10-26 19:36:07,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:07,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554657236] [2020-10-26 19:36:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:08,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:08,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:13,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:13,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:36:13,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:13,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:36:13,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:13,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:36:13,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:13,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:36:13,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:13,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:13,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:13,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:13,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:13,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:13,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:36:13,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:13,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:13,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:13,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:13,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:13,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:36:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:13,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:13,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:13,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:13,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:13,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:13,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:13,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:13,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:13,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:13,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:13,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:36:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:13,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:13,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:13,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:13,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:13,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:13,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:13,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:13,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:13,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:13,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:13,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:36:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:13,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:13,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:13,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:13,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:13,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:13,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:13,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:13,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:13,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:13,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 6 proven. 465 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:36:13,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554657236] [2020-10-26 19:36:13,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:13,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:36:13,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187535619] [2020-10-26 19:36:13,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:36:13,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:13,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:36:13,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:36:13,803 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand 34 states. [2020-10-26 19:36:14,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:14,121 INFO L93 Difference]: Finished difference Result 157 states and 171 transitions. [2020-10-26 19:36:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:36:14,121 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-26 19:36:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:14,122 INFO L225 Difference]: With dead ends: 157 [2020-10-26 19:36:14,122 INFO L226 Difference]: Without dead ends: 101 [2020-10-26 19:36:14,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 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 19:36:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-26 19:36:14,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2020-10-26 19:36:14,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:36:14,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2020-10-26 19:36:14,138 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 74 [2020-10-26 19:36:14,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:14,139 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2020-10-26 19:36:14,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:36:14,139 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2020-10-26 19:36:14,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:36:14,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:14,140 INFO L422 BasicCegarLoop]: trace histogram [31, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:14,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:36:14,140 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:14,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:14,141 INFO L82 PathProgramCache]: Analyzing trace with hash 557392096, now seen corresponding path program 33 times [2020-10-26 19:36:14,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:14,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031351658] [2020-10-26 19:36:14,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:14,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:14,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:19,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:19,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:36:19,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:19,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:36:19,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:19,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:36:19,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:19,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:36:19,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:20,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:20,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:20,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:20,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:20,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:20,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:20,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:20,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:20,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:20,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:20,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:20,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:36:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:20,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:20,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:20,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:20,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:20,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:20,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:20,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:20,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:36:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:20,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:20,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:20,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:20,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:20,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:20,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:20,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:20,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:20,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:20,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:20,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:36:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:20,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:20,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:20,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:20,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:20,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:20,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:20,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:20,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:20,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:20,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 6 proven. 496 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:36:20,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031351658] [2020-10-26 19:36:20,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:20,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:36:20,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710389444] [2020-10-26 19:36:20,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:36:20,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:20,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:36:20,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:36:20,125 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand 35 states. [2020-10-26 19:36:20,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:20,614 INFO L93 Difference]: Finished difference Result 145 states and 157 transitions. [2020-10-26 19:36:20,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:36:20,615 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 75 [2020-10-26 19:36:20,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:20,616 INFO L225 Difference]: With dead ends: 145 [2020-10-26 19:36:20,616 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:36:20,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 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 19:36:20,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:36:20,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-10-26 19:36:20,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 19:36:20,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-26 19:36:20,630 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 75 [2020-10-26 19:36:20,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:20,630 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-26 19:36:20,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:36:20,630 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-26 19:36:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:36:20,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:20,631 INFO L422 BasicCegarLoop]: trace histogram [32, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:20,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:36:20,632 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:20,632 INFO L82 PathProgramCache]: Analyzing trace with hash 62655762, now seen corresponding path program 34 times [2020-10-26 19:36:20,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:20,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392784355] [2020-10-26 19:36:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:20,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:20,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:25,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:25,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:36:25,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:25,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:36:25,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:25,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:36:25,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:25,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:36:25,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:26,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:26,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:26,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:26,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:26,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:26,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:26,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:26,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:26,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:26,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:26,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:26,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:36:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:26,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:26,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:26,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:26,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:26,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:26,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:26,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:26,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:36:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:26,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:26,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:26,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:26,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:26,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:26,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:26,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:26,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:26,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:26,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:26,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:36:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:26,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:26,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:26,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:26,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:26,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:26,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:26,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:26,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:26,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:26,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 6 proven. 528 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:36:26,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392784355] [2020-10-26 19:36:26,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:26,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:36:26,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753300518] [2020-10-26 19:36:26,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:36:26,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:26,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:36:26,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:36:26,589 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 36 states. [2020-10-26 19:36:26,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:26,948 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2020-10-26 19:36:26,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:36:26,949 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-10-26 19:36:26,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:26,950 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:36:26,950 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:36:26,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:36:26,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:36:26,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2020-10-26 19:36:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:36:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-26 19:36:26,963 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-10-26 19:36:26,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:26,963 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-26 19:36:26,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:36:26,963 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-26 19:36:26,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:36:26,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:26,964 INFO L422 BasicCegarLoop]: trace histogram [33, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:26,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:36:26,965 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:26,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:26,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1905698592, now seen corresponding path program 35 times [2020-10-26 19:36:26,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:26,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21661936] [2020-10-26 19:36:26,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:26,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:27,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:32,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:32,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:36:32,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:32,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 19:36:32,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:32,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:36:32,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:32,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:36:32,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:32,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:32,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:32,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:32,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:32,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:32,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:32,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:32,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:32,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:32,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:32,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:32,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:36:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:32,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:32,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:32,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:32,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:32,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:32,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:32,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:32,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:32,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:32,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:32,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:36:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:32,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:32,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:32,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:32,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:32,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:32,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:32,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:32,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:32,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:32,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:32,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-26 19:36:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:32,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:32,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:32,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:32,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:32,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:32,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:32,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:32,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:32,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:32,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 6 proven. 561 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:36:33,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21661936] [2020-10-26 19:36:33,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:33,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:36:33,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815817866] [2020-10-26 19:36:33,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:36:33,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:33,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:36:33,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:36:33,003 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 37 states. [2020-10-26 19:36:33,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:33,535 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2020-10-26 19:36:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:36:33,536 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 77 [2020-10-26 19:36:33,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:33,537 INFO L225 Difference]: With dead ends: 131 [2020-10-26 19:36:33,538 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:36:33,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 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 19:36:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:36:33,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2020-10-26 19:36:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:36:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-26 19:36:33,551 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2020-10-26 19:36:33,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:33,551 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-26 19:36:33,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:36:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-26 19:36:33,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:36:33,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:33,552 INFO L422 BasicCegarLoop]: trace histogram [34, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:33,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:36:33,553 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:33,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:33,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1089515822, now seen corresponding path program 36 times [2020-10-26 19:36:33,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:33,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329855167] [2020-10-26 19:36:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:33,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:33,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:38,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:38,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:36:38,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:38,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:36:38,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:38,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:36:38,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:38,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:36:38,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:39,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:39,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:39,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:39,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:39,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:39,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:39,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:39,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:39,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:36:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:39,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:39,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:39,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:39,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:39,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:39,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:39,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:39,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:39,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:39,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:39,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:36:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:39,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:39,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:39,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:39,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:39,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:39,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:39,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:39,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:39,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:39,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:39,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:36:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:39,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:39,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:39,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:39,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:39,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:39,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:39,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:39,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:39,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:39,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 6 proven. 595 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:36:39,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329855167] [2020-10-26 19:36:39,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:39,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:36:39,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089147149] [2020-10-26 19:36:39,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:36:39,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:39,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:36:39,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:36:39,637 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 38 states. [2020-10-26 19:36:40,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:40,178 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2020-10-26 19:36:40,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:36:40,180 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 78 [2020-10-26 19:36:40,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:40,181 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:36:40,181 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:36:40,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 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 19:36:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:36:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2020-10-26 19:36:40,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:36:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-26 19:36:40,197 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2020-10-26 19:36:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:40,197 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-26 19:36:40,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:36:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-26 19:36:40,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:36:40,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:40,198 INFO L422 BasicCegarLoop]: trace histogram [35, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:40,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:36:40,198 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:40,199 INFO L82 PathProgramCache]: Analyzing trace with hash 548117856, now seen corresponding path program 37 times [2020-10-26 19:36:40,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:40,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759763853] [2020-10-26 19:36:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:40,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:40,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:45,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:45,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:36:45,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:45,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:36:45,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:45,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:36:45,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:45,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:36:45,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:46,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:46,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:46,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:46,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:46,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:46,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:36:46,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:46,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:46,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:46,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:46,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:36:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:46,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:46,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:46,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:46,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:46,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:46,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:46,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:46,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:36:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:46,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:46,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:46,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:46,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:46,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:46,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:46,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:46,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:46,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:46,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:46,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:36:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:46,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:46,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:46,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:46,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:46,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:46,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:46,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:46,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:46,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:46,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 6 proven. 630 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:36:46,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759763853] [2020-10-26 19:36:46,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:46,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:36:46,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563460361] [2020-10-26 19:36:46,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:36:46,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:46,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:36:46,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:36:46,361 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 39 states. [2020-10-26 19:36:46,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:46,881 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2020-10-26 19:36:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:36:46,882 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 79 [2020-10-26 19:36:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:46,883 INFO L225 Difference]: With dead ends: 133 [2020-10-26 19:36:46,883 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:36:46,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 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 19:36:46,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:36:46,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-10-26 19:36:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:36:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-26 19:36:46,898 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2020-10-26 19:36:46,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:46,898 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-26 19:36:46,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:36:46,899 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-26 19:36:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 19:36:46,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:46,899 INFO L422 BasicCegarLoop]: trace histogram [36, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:46,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:36:46,900 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:46,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:46,900 INFO L82 PathProgramCache]: Analyzing trace with hash -224845678, now seen corresponding path program 38 times [2020-10-26 19:36:46,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:46,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041870255] [2020-10-26 19:36:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:46,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:47,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:51,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:51,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:36:51,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:51,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:36:51,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:51,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:36:51,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:51,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:36:51,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:53,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:53,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:53,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:53,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:53,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:53,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:53,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:53,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:53,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:53,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:53,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:53,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:36:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:53,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:53,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:53,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:53,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:53,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:53,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:53,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:53,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:53,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:53,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:53,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-26 19:36:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:53,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:53,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:53,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:53,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:53,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:53,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:53,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:53,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:53,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:53,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:53,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:36:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:53,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:53,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:53,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:53,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:53,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:53,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:53,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:53,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:53,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:53,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 6 proven. 666 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:36:53,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041870255] [2020-10-26 19:36:53,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:53,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:36:53,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230638227] [2020-10-26 19:36:53,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:36:53,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:53,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:36:53,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:36:53,108 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 40 states. [2020-10-26 19:36:53,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:53,472 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2020-10-26 19:36:53,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:36:53,473 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 80 [2020-10-26 19:36:53,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:53,474 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:36:53,474 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:36:53,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:36:53,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:36:53,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2020-10-26 19:36:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:36:53,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-26 19:36:53,489 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 80 [2020-10-26 19:36:53,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:53,489 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-26 19:36:53,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:36:53,489 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-26 19:36:53,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:36:53,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:53,490 INFO L422 BasicCegarLoop]: trace histogram [37, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:53,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:36:53,490 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:53,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:53,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1583088544, now seen corresponding path program 39 times [2020-10-26 19:36:53,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:53,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437740059] [2020-10-26 19:36:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:53,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:53,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:58,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:58,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:36:58,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:58,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:36:58,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:58,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:36:58,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:58,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:36:58,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:59,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:59,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:59,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:59,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:59,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:59,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:59,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:59,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:59,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:59,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:59,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:59,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:36:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:59,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:59,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:59,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:59,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:59,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:59,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:59,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:59,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:59,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:59,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:59,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:36:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:59,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:59,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:59,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:59,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:59,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:59,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:59,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:59,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:59,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:59,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:59,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-26 19:36:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:59,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:59,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:59,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:59,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:59,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:59,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:59,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:59,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:59,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:59,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 6 proven. 703 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:36:59,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437740059] [2020-10-26 19:36:59,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:59,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:36:59,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797658955] [2020-10-26 19:36:59,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:36:59,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:59,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:36:59,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:36:59,742 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 41 states. [2020-10-26 19:37:00,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:00,397 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2020-10-26 19:37:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:37:00,398 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2020-10-26 19:37:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:00,399 INFO L225 Difference]: With dead ends: 139 [2020-10-26 19:37:00,399 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:37:00,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 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 19:37:00,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:37:00,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2020-10-26 19:37:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:37:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-26 19:37:00,417 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 81 [2020-10-26 19:37:00,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:00,417 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-26 19:37:00,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:37:00,417 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-26 19:37:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:37:00,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:00,418 INFO L422 BasicCegarLoop]: trace histogram [38, 7, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:00,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 19:37:00,418 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:00,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:00,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1482688161, now seen corresponding path program 40 times [2020-10-26 19:37:00,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:00,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019113509] [2020-10-26 19:37:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:00,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:01,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking...