/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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-crafted/zero_sum5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:43:34,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:43:34,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:43:34,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:43:34,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:43:34,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:43:34,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:43:34,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:43:34,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:43:34,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:43:34,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:43:34,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:43:34,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:43:34,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:43:34,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:43:34,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:43:34,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:43:34,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:43:34,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:43:34,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:43:34,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:43:34,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:43:34,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:43:34,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:43:34,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:43:34,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:43:34,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:43:34,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:43:34,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:43:34,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:43:34,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:43:34,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:43:34,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:43:34,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:43:34,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:43:34,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:43:34,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:43:34,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:43:34,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:43:34,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:43:34,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:43:34,163 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 [2020-10-28 08:43:34,218 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:43:34,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:43:34,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:43:34,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:43:34,223 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:43:34,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:43:34,224 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:43:34,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:43:34,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:43:34,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:43:34,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:43:34,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:43:34,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:43:34,226 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:43:34,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:43:34,226 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:43:34,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:43:34,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:43:34,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:43:34,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:43:34,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:43:34,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:43:34,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:43:34,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:43:34,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:43:34,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:43:34,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:43:34,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:43:34,229 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:43:34,229 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:43:34,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:43:34,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:43:34,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:43:34,628 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:43:34,628 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:43:34,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum5.c [2020-10-28 08:43:34,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0e518c0b/f340432f0bd24495a55779d223689b7e/FLAG3574e05b4 [2020-10-28 08:43:35,396 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:43:35,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum5.c [2020-10-28 08:43:35,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0e518c0b/f340432f0bd24495a55779d223689b7e/FLAG3574e05b4 [2020-10-28 08:43:35,753 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0e518c0b/f340432f0bd24495a55779d223689b7e [2020-10-28 08:43:35,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:43:35,767 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:43:35,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:43:35,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:43:35,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:43:35,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:43:35" (1/1) ... [2020-10-28 08:43:35,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d444718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:35, skipping insertion in model container [2020-10-28 08:43:35,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:43:35" (1/1) ... [2020-10-28 08:43:35,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:43:35,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:43:36,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:43:36,037 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:43:36,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:43:36,082 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:43:36,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:36 WrapperNode [2020-10-28 08:43:36,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:43:36,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:43:36,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:43:36,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:43:36,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:36" (1/1) ... [2020-10-28 08:43:36,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:36" (1/1) ... [2020-10-28 08:43:36,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:36" (1/1) ... [2020-10-28 08:43:36,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:36" (1/1) ... [2020-10-28 08:43:36,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:36" (1/1) ... [2020-10-28 08:43:36,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:36" (1/1) ... [2020-10-28 08:43:36,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:36" (1/1) ... [2020-10-28 08:43:36,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:43:36,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:43:36,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:43:36,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:43:36,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:36" (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 [2020-10-28 08:43:36,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:43:36,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:43:36,218 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:43:36,219 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 08:43:36,219 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:43:36,219 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:43:36,219 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:43:36,219 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:43:36,219 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:43:36,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:43:36,220 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 08:43:36,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:43:36,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-28 08:43:36,220 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:43:36,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:43:36,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:43:36,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:43:36,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:43:36,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:43:36,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:43:36,883 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:43:36,883 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-28 08:43:36,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:43:36 BoogieIcfgContainer [2020-10-28 08:43:36,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:43:36,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:43:36,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:43:36,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:43:36,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:43:35" (1/3) ... [2020-10-28 08:43:36,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37afda0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:43:36, skipping insertion in model container [2020-10-28 08:43:36,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:36" (2/3) ... [2020-10-28 08:43:36,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37afda0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:43:36, skipping insertion in model container [2020-10-28 08:43:36,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:43:36" (3/3) ... [2020-10-28 08:43:36,901 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum5.c [2020-10-28 08:43:36,915 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:43:36,920 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:43:36,935 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:43:36,977 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:43:36,978 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:43:36,978 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:43:36,978 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:43:36,978 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:43:36,978 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:43:36,979 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:43:36,979 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:43:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-28 08:43:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 08:43:37,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:37,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:43:37,011 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:37,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:37,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1682014752, now seen corresponding path program 1 times [2020-10-28 08:43:37,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:37,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705529597] [2020-10-28 08:43:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:37,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:37,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:37,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:37,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:37,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:37,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:37,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:37,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:37,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:37,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:38,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:39,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:42,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:42,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 08:43:42,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 08:43:42,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:43:42,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:42,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:42,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:42,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:43:42,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:42,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 08:43:42,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:42,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:42,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:42,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:42,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:42,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:43:42,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:42,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:42,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:42,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:42,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:42,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:43:42,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705529597] [2020-10-28 08:43:42,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:43:42,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:43:42,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673545680] [2020-10-28 08:43:42,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:43:42,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:42,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:43:42,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:43:42,408 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-10-28 08:43:42,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:42,613 INFO L93 Difference]: Finished difference Result 100 states and 145 transitions. [2020-10-28 08:43:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:43:42,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-10-28 08:43:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:42,625 INFO L225 Difference]: With dead ends: 100 [2020-10-28 08:43:42,625 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 08:43:42,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:43:42,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 08:43:42,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-28 08:43:42,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 08:43:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-28 08:43:42,688 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 33 [2020-10-28 08:43:42,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:42,689 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-28 08:43:42,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:43:42,690 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-28 08:43:42,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 08:43:42,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:42,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:43:42,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:43:42,694 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:42,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:42,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1226635186, now seen corresponding path program 1 times [2020-10-28 08:43:42,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:42,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052987742] [2020-10-28 08:43:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:42,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:42,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:42,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:42,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:42,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:42,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:42,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:42,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:42,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:43,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:44,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:47,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:47,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 08:43:47,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 08:43:47,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:43:47,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:47,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:43:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:43:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:43:47,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 08:43:47,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:47,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:47,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:47,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:47,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:47,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 08:43:47,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:47,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:47,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:47,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:47,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:47,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:43:47,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052987742] [2020-10-28 08:43:47,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:43:47,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 08:43:47,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357434311] [2020-10-28 08:43:47,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:43:47,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:47,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:43:47,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:43:47,880 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 5 states. [2020-10-28 08:43:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:48,114 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2020-10-28 08:43:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:43:48,115 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-28 08:43:48,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:48,116 INFO L225 Difference]: With dead ends: 98 [2020-10-28 08:43:48,116 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 08:43:48,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:43:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 08:43:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-10-28 08:43:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 08:43:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-28 08:43:48,129 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2020-10-28 08:43:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:48,129 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-28 08:43:48,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:43:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-28 08:43:48,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 08:43:48,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:48,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:43:48,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:43:48,132 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:48,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:48,132 INFO L82 PathProgramCache]: Analyzing trace with hash 419710214, now seen corresponding path program 1 times [2020-10-28 08:43:48,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:48,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901299071] [2020-10-28 08:43:48,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:48,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:48,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:48,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:48,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:48,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:48,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:48,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:48,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:50,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:53,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:53,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 08:43:53,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 08:43:53,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:43:53,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:53,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:53,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:43:53,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:43:53,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:43:53,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:53,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:53,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:53,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:53,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:53,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:53,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:43:53,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:53,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:53,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:53,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:53,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:53,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 08:43:53,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901299071] [2020-10-28 08:43:53,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:43:53,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:43:53,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879162011] [2020-10-28 08:43:53,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:43:53,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:53,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:43:53,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:43:53,236 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 4 states. [2020-10-28 08:43:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:53,421 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2020-10-28 08:43:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:43:53,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-28 08:43:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:53,424 INFO L225 Difference]: With dead ends: 103 [2020-10-28 08:43:53,425 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 08:43:53,426 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 [2020-10-28 08:43:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 08:43:53,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-28 08:43:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 08:43:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-28 08:43:53,442 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 53 [2020-10-28 08:43:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:53,443 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-28 08:43:53,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:43:53,443 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-28 08:43:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 08:43:53,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:53,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:43:53,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:43:53,448 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:53,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:53,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1326801144, now seen corresponding path program 1 times [2020-10-28 08:43:53,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:53,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229131330] [2020-10-28 08:43:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:53,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:53,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:53,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:53,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:53,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:53,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:53,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:53,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:57,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:58,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:58,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 08:43:58,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 08:43:58,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:43:58,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:58,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:58,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:43:58,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:43:58,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:43:58,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:58,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:58,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:58,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:58,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:58,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:58,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:43:58,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:58,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:58,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:58,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:58,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:58,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 08:43:58,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229131330] [2020-10-28 08:43:58,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:43:58,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:43:58,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110639106] [2020-10-28 08:43:58,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:43:58,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:58,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:43:58,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:43:58,581 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 6 states. [2020-10-28 08:43:58,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:58,884 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2020-10-28 08:43:58,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:43:58,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-28 08:43:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:58,885 INFO L225 Difference]: With dead ends: 118 [2020-10-28 08:43:58,886 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 08:43:58,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:43:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 08:43:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-28 08:43:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 08:43:58,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-10-28 08:43:58,903 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 55 [2020-10-28 08:43:58,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:58,903 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-10-28 08:43:58,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:43:58,903 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-10-28 08:43:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 08:43:58,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:58,908 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:43:58,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:43:58,910 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:58,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1880241500, now seen corresponding path program 2 times [2020-10-28 08:43:58,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:58,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613901521] [2020-10-28 08:43:58,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:58,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:59,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:59,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:00,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:02,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:03,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:04,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:04,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 08:44:04,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:44:04,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5112 [2020-10-28 08:44:04,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:04,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:04,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:44:04,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:04,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:44:04,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:44:04,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:04,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:04,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:04,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:04,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:04,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 08:44:04,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:04,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:04,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:04,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:04,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:04,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-28 08:44:04,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613901521] [2020-10-28 08:44:04,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:04,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:44:04,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856753654] [2020-10-28 08:44:04,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:44:04,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:04,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:44:04,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:44:04,157 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 5 states. [2020-10-28 08:44:04,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:04,307 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2020-10-28 08:44:04,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:44:04,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-28 08:44:04,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:04,309 INFO L225 Difference]: With dead ends: 144 [2020-10-28 08:44:04,311 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 08:44:04,312 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 [2020-10-28 08:44:04,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 08:44:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-28 08:44:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 08:44:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2020-10-28 08:44:04,330 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 75 [2020-10-28 08:44:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:04,332 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2020-10-28 08:44:04,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:44:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2020-10-28 08:44:04,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 08:44:04,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:04,336 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:44:04,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:44:04,337 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:04,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:04,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2075935198, now seen corresponding path program 3 times [2020-10-28 08:44:04,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:04,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449221543] [2020-10-28 08:44:04,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:04,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:05,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:06,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:07,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:09,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:09,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:09,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 08:44:09,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:44:09,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5184 [2020-10-28 08:44:09,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:09,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:09,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 08:44:09,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:09,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 08:44:09,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:10,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:10,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:10,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:10,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:10,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:10,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:44:10,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:10,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:10,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:10,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:10,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:10,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:44:10,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449221543] [2020-10-28 08:44:10,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:10,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 08:44:10,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937805039] [2020-10-28 08:44:10,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 08:44:10,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:10,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 08:44:10,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:44:10,961 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 30 states. [2020-10-28 08:44:12,276 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-28 08:44:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:13,998 INFO L93 Difference]: Finished difference Result 140 states and 159 transitions. [2020-10-28 08:44:13,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:44:13,998 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 77 [2020-10-28 08:44:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:14,000 INFO L225 Difference]: With dead ends: 140 [2020-10-28 08:44:14,000 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 08:44:14,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=189, Invalid=1881, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 08:44:14,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 08:44:14,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-10-28 08:44:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-28 08:44:14,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2020-10-28 08:44:14,027 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 77 [2020-10-28 08:44:14,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:14,027 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2020-10-28 08:44:14,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 08:44:14,027 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2020-10-28 08:44:14,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 08:44:14,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:14,029 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:44:14,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:44:14,030 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:14,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:14,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1186316640, now seen corresponding path program 4 times [2020-10-28 08:44:14,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:14,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124921667] [2020-10-28 08:44:14,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:14,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:14,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:14,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:14,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:14,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:14,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:15,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:19,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:19,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 08:44:19,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:44:19,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:44:19,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:19,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:19,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:44:19,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 08:44:19,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:44:19,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:19,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:19,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:19,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:19,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:19,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:19,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:44:19,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:19,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:19,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:19,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:19,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:19,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 08:44:19,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124921667] [2020-10-28 08:44:19,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:19,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:44:19,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192993877] [2020-10-28 08:44:19,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:44:19,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:19,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:44:19,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:44:19,207 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand 10 states. [2020-10-28 08:44:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:20,161 INFO L93 Difference]: Finished difference Result 206 states and 241 transitions. [2020-10-28 08:44:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:44:20,162 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-10-28 08:44:20,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:20,164 INFO L225 Difference]: With dead ends: 206 [2020-10-28 08:44:20,164 INFO L226 Difference]: Without dead ends: 152 [2020-10-28 08:44:20,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:44:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-28 08:44:20,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 141. [2020-10-28 08:44:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-28 08:44:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 159 transitions. [2020-10-28 08:44:20,185 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 159 transitions. Word has length 79 [2020-10-28 08:44:20,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:20,186 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 159 transitions. [2020-10-28 08:44:20,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:44:20,186 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 159 transitions. [2020-10-28 08:44:20,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 08:44:20,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:20,187 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:44:20,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:44:20,188 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:20,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:20,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1753728928, now seen corresponding path program 5 times [2020-10-28 08:44:20,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:20,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30365792] [2020-10-28 08:44:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:20,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:20,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:20,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:20,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:20,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:20,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:20,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:24,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:25,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:25,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 08:44:25,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:44:25,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:44:25,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:25,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:25,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:44:25,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:25,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 08:44:25,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:25,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:25,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:25,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:25,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:25,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:25,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:44:25,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:25,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:25,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:25,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:25,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:25,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 08:44:25,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30365792] [2020-10-28 08:44:25,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:25,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:44:25,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422589854] [2020-10-28 08:44:25,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:44:25,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:25,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:44:25,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:44:25,337 INFO L87 Difference]: Start difference. First operand 141 states and 159 transitions. Second operand 10 states. [2020-10-28 08:44:25,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:25,920 INFO L93 Difference]: Finished difference Result 284 states and 321 transitions. [2020-10-28 08:44:25,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:44:25,920 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-10-28 08:44:25,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:25,922 INFO L225 Difference]: With dead ends: 284 [2020-10-28 08:44:25,924 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 08:44:25,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:44:25,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 08:44:25,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-28 08:44:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-28 08:44:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 161 transitions. [2020-10-28 08:44:25,962 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 161 transitions. Word has length 79 [2020-10-28 08:44:25,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:25,962 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 161 transitions. [2020-10-28 08:44:25,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:44:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 161 transitions. [2020-10-28 08:44:25,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 08:44:25,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:25,969 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:44:25,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:44:25,970 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:25,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:25,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1852060642, now seen corresponding path program 6 times [2020-10-28 08:44:25,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:25,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525228311] [2020-10-28 08:44:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:26,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:26,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:26,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:26,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:26,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:26,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:26,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:28,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:30,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:31,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 08:44:31,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:44:31,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:44:31,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:31,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:31,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:44:31,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 08:44:31,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 08:44:31,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:31,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:31,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:31,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:31,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:31,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:31,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:44:31,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:31,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:31,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:31,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:31,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:31,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-28 08:44:31,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525228311] [2020-10-28 08:44:31,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:31,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:44:31,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213098737] [2020-10-28 08:44:31,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:44:31,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:31,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:44:31,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:44:31,132 INFO L87 Difference]: Start difference. First operand 143 states and 161 transitions. Second operand 10 states. [2020-10-28 08:44:31,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:31,920 INFO L93 Difference]: Finished difference Result 236 states and 263 transitions. [2020-10-28 08:44:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:44:31,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-10-28 08:44:31,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:31,922 INFO L225 Difference]: With dead ends: 236 [2020-10-28 08:44:31,923 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 08:44:31,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:44:31,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 08:44:31,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-10-28 08:44:31,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 08:44:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2020-10-28 08:44:31,947 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 81 [2020-10-28 08:44:31,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:31,948 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2020-10-28 08:44:31,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:44:31,948 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2020-10-28 08:44:31,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 08:44:31,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:31,950 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:44:31,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:44:31,950 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:31,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:31,951 INFO L82 PathProgramCache]: Analyzing trace with hash 997736500, now seen corresponding path program 7 times [2020-10-28 08:44:31,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:31,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362450132] [2020-10-28 08:44:31,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:32,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:33,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:34,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:37,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:37,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 08:44:37,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:44:37,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:44:37,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:37,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:37,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-28 08:44:37,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:37,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-28 08:44:37,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-28 08:44:38,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:38,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:38,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:38,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:38,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:38,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:44:38,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:38,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:38,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:38,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:38,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:38,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:44:38,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362450132] [2020-10-28 08:44:38,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:38,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 08:44:38,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213469133] [2020-10-28 08:44:38,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 08:44:38,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:38,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 08:44:38,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:44:38,408 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 25 states. [2020-10-28 08:44:39,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:39,961 INFO L93 Difference]: Finished difference Result 180 states and 199 transitions. [2020-10-28 08:44:39,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:44:39,962 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 99 [2020-10-28 08:44:39,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:39,963 INFO L225 Difference]: With dead ends: 180 [2020-10-28 08:44:39,964 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 08:44:39,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 13 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:44:39,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 08:44:39,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2020-10-28 08:44:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-28 08:44:39,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 188 transitions. [2020-10-28 08:44:39,981 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 188 transitions. Word has length 99 [2020-10-28 08:44:39,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:39,983 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 188 transitions. [2020-10-28 08:44:39,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 08:44:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 188 transitions. [2020-10-28 08:44:39,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 08:44:39,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:39,984 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:44:39,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:44:39,985 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:39,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:39,985 INFO L82 PathProgramCache]: Analyzing trace with hash -936525962, now seen corresponding path program 8 times [2020-10-28 08:44:39,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:39,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5698984] [2020-10-28 08:44:39,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:40,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:40,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:40,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:40,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:40,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:40,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:41,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:45,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:45,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 08:44:45,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:44:45,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:44:45,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:45,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:45,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:44:45,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 08:44:45,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:44:45,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:45,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:45,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:45,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:45,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:45,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:45,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:44:45,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:45,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:45,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:45,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:45,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:45,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 08:44:45,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5698984] [2020-10-28 08:44:45,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:45,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:44:45,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255299901] [2020-10-28 08:44:45,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:44:45,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:45,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:44:45,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:44:45,188 INFO L87 Difference]: Start difference. First operand 169 states and 188 transitions. Second operand 12 states. [2020-10-28 08:44:46,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:46,342 INFO L93 Difference]: Finished difference Result 262 states and 297 transitions. [2020-10-28 08:44:46,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:44:46,343 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2020-10-28 08:44:46,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:46,344 INFO L225 Difference]: With dead ends: 262 [2020-10-28 08:44:46,344 INFO L226 Difference]: Without dead ends: 192 [2020-10-28 08:44:46,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:44:46,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-28 08:44:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 177. [2020-10-28 08:44:46,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-28 08:44:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 195 transitions. [2020-10-28 08:44:46,364 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 195 transitions. Word has length 101 [2020-10-28 08:44:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:46,366 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 195 transitions. [2020-10-28 08:44:46,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:44:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 195 transitions. [2020-10-28 08:44:46,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 08:44:46,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:46,371 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:44:46,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:44:46,371 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:46,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:46,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1479407926, now seen corresponding path program 9 times [2020-10-28 08:44:46,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:46,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879349477] [2020-10-28 08:44:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:46,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:46,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:46,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:46,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:46,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:46,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:47,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:51,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:51,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 08:44:51,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:44:51,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:44:51,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:51,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:51,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:44:51,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:51,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 08:44:51,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:51,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:51,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:51,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:51,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:51,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:51,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:44:51,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:51,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:51,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:51,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:51,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:51,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 08:44:51,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879349477] [2020-10-28 08:44:51,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:51,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:44:51,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255762866] [2020-10-28 08:44:51,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:44:51,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:51,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:44:51,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:44:51,562 INFO L87 Difference]: Start difference. First operand 177 states and 195 transitions. Second operand 12 states. [2020-10-28 08:44:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:52,233 INFO L93 Difference]: Finished difference Result 358 states and 395 transitions. [2020-10-28 08:44:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:44:52,233 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2020-10-28 08:44:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:52,235 INFO L225 Difference]: With dead ends: 358 [2020-10-28 08:44:52,235 INFO L226 Difference]: Without dead ends: 180 [2020-10-28 08:44:52,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:44:52,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-28 08:44:52,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2020-10-28 08:44:52,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-28 08:44:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 197 transitions. [2020-10-28 08:44:52,249 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 197 transitions. Word has length 101 [2020-10-28 08:44:52,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:52,250 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 197 transitions. [2020-10-28 08:44:52,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:44:52,250 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 197 transitions. [2020-10-28 08:44:52,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 08:44:52,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:52,251 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:44:52,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:44:52,252 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:52,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:52,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1421113544, now seen corresponding path program 10 times [2020-10-28 08:44:52,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:52,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814049041] [2020-10-28 08:44:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:52,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:52,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:52,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:52,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:52,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:52,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:52,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:57,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:57,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 08:44:57,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:44:57,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:44:57,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:57,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:57,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:44:57,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 08:44:57,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 08:44:57,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:57,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:57,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:57,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:57,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:57,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:57,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:44:57,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:57,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:57,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:57,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:57,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:57,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-10-28 08:44:57,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814049041] [2020-10-28 08:44:57,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:57,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:44:57,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075539765] [2020-10-28 08:44:57,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:44:57,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:57,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:44:57,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:44:57,427 INFO L87 Difference]: Start difference. First operand 179 states and 197 transitions. Second operand 12 states. [2020-10-28 08:44:58,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:58,197 INFO L93 Difference]: Finished difference Result 292 states and 319 transitions. [2020-10-28 08:44:58,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:44:58,198 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 103 [2020-10-28 08:44:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:58,199 INFO L225 Difference]: With dead ends: 292 [2020-10-28 08:44:58,199 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 08:44:58,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:44:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 08:44:58,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 122. [2020-10-28 08:44:58,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 08:44:58,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2020-10-28 08:44:58,213 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 103 [2020-10-28 08:44:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:58,213 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2020-10-28 08:44:58,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:44:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2020-10-28 08:44:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 08:44:58,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:58,215 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:44:58,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:44:58,215 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:58,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:58,215 INFO L82 PathProgramCache]: Analyzing trace with hash -251856374, now seen corresponding path program 11 times [2020-10-28 08:44:58,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:58,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795031543] [2020-10-28 08:44:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:58,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:00,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:03,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:03,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 08:45:03,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:45:03,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 08:45:03,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:03,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:03,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 88 [2020-10-28 08:45:03,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:45:03,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-28 08:45:03,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:07,861 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2020-10-28 08:45:08,066 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2020-10-28 08:45:09,195 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2020-10-28 08:45:09,596 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-10-28 08:45:16,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:45:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:16,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:16,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:16,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:45:16,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:45:16,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:45:16,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:16,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:16,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:45:16,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:45:16,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:45:16,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 6 proven. 154 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 08:45:16,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795031543] [2020-10-28 08:45:16,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:45:16,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-28 08:45:16,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886205225] [2020-10-28 08:45:16,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-28 08:45:16,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:45:16,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-28 08:45:16,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=5330, Unknown=0, NotChecked=0, Total=5852 [2020-10-28 08:45:16,329 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 77 states. [2020-10-28 08:45:16,983 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 36 [2020-10-28 08:45:18,308 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 49 [2020-10-28 08:45:19,908 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2020-10-28 08:45:20,230 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 33 [2020-10-28 08:45:20,680 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 52 [2020-10-28 08:45:22,330 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2020-10-28 08:45:22,770 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2020-10-28 08:45:23,094 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2020-10-28 08:45:23,605 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-28 08:45:24,025 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-10-28 08:45:24,603 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-28 08:45:29,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:45:29,618 INFO L93 Difference]: Finished difference Result 262 states and 285 transitions. [2020-10-28 08:45:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-28 08:45:29,619 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 121 [2020-10-28 08:45:29,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:45:29,621 INFO L225 Difference]: With dead ends: 262 [2020-10-28 08:45:29,622 INFO L226 Difference]: Without dead ends: 245 [2020-10-28 08:45:29,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 3 SyntacticMatches, 13 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3478 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=1116, Invalid=10656, Unknown=0, NotChecked=0, Total=11772 [2020-10-28 08:45:29,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-28 08:45:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 197. [2020-10-28 08:45:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-28 08:45:29,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 215 transitions. [2020-10-28 08:45:29,642 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 215 transitions. Word has length 121 [2020-10-28 08:45:29,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:45:29,642 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 215 transitions. [2020-10-28 08:45:29,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-28 08:45:29,642 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 215 transitions. [2020-10-28 08:45:29,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 08:45:29,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:45:29,644 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:45:29,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:45:29,644 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:45:29,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:45:29,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1063853004, now seen corresponding path program 12 times [2020-10-28 08:45:29,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:45:29,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931523965] [2020-10-28 08:45:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:45:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:29,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:29,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:29,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:29,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:29,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:30,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:34,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:34,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:34,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 08:45:34,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:45:34,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 08:45:34,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:34,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:34,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:45:34,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 08:45:34,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 08:45:34,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:34,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:45:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:34,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:34,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:34,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:45:34,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:45:34,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:45:34,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:34,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:34,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:45:34,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:45:34,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:45:34,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 08:45:34,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931523965] [2020-10-28 08:45:34,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:45:34,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:45:34,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876935789] [2020-10-28 08:45:34,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:45:34,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:45:34,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:45:34,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:45:34,880 INFO L87 Difference]: Start difference. First operand 197 states and 215 transitions. Second operand 14 states. [2020-10-28 08:45:36,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:45:36,747 INFO L93 Difference]: Finished difference Result 409 states and 455 transitions. [2020-10-28 08:45:36,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:45:36,748 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 123 [2020-10-28 08:45:36,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:45:36,752 INFO L225 Difference]: With dead ends: 409 [2020-10-28 08:45:36,752 INFO L226 Difference]: Without dead ends: 270 [2020-10-28 08:45:36,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:45:36,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-28 08:45:36,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 203. [2020-10-28 08:45:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-28 08:45:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 220 transitions. [2020-10-28 08:45:36,776 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 220 transitions. Word has length 123 [2020-10-28 08:45:36,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:45:36,776 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 220 transitions. [2020-10-28 08:45:36,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:45:36,776 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 220 transitions. [2020-10-28 08:45:36,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 08:45:36,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:45:36,778 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:45:36,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:45:36,778 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:45:36,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:45:36,778 INFO L82 PathProgramCache]: Analyzing trace with hash -713379762, now seen corresponding path program 13 times [2020-10-28 08:45:36,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:45:36,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150012035] [2020-10-28 08:45:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:45:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:36,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:36,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:36,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:36,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:36,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:36,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:37,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:41,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:41,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 08:45:41,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:45:41,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 08:45:41,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:41,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:41,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:45:41,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:45:41,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-28 08:45:41,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:42,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:45:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:42,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:42,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:42,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:45:42,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:45:42,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:45:42,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:42,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:42,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:45:42,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:45:42,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:45:42,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:45:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-28 08:45:42,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150012035] [2020-10-28 08:45:42,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:45:42,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:45:42,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539504065] [2020-10-28 08:45:42,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:45:42,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:45:42,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:45:42,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:45:42,044 INFO L87 Difference]: Start difference. First operand 203 states and 220 transitions. Second operand 14 states. [2020-10-28 08:45:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:45:43,068 INFO L93 Difference]: Finished difference Result 412 states and 447 transitions. [2020-10-28 08:45:43,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:45:43,070 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 125 [2020-10-28 08:45:43,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:45:43,071 INFO L225 Difference]: With dead ends: 412 [2020-10-28 08:45:43,071 INFO L226 Difference]: Without dead ends: 206 [2020-10-28 08:45:43,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:45:43,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-28 08:45:43,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2020-10-28 08:45:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-28 08:45:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 222 transitions. [2020-10-28 08:45:43,090 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 222 transitions. Word has length 125 [2020-10-28 08:45:43,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:45:43,090 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 222 transitions. [2020-10-28 08:45:43,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:45:43,091 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 222 transitions. [2020-10-28 08:45:43,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 08:45:43,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:45:43,092 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:45:43,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:45:43,093 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:45:43,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:45:43,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1263609776, now seen corresponding path program 14 times [2020-10-28 08:45:43,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:45:43,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388368173] [2020-10-28 08:45:43,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:45:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:43,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:43,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:43,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:43,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:43,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:43,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:44,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:48,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:48,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 08:45:48,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:45:48,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 08:45:48,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:48,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:48,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:45:48,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 08:45:48,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 08:45:48,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:48,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:45:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:48,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:48,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:48,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:45:48,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:45:48,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:45:48,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:48,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:48,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:45:48,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:45:48,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:45:48,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-28 08:45:48,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388368173] [2020-10-28 08:45:48,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:45:48,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:45:48,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987426718] [2020-10-28 08:45:48,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:45:48,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:45:48,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:45:48,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:45:48,315 INFO L87 Difference]: Start difference. First operand 205 states and 222 transitions. Second operand 14 states. [2020-10-28 08:45:49,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:45:49,349 INFO L93 Difference]: Finished difference Result 338 states and 364 transitions. [2020-10-28 08:45:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:45:49,350 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 127 [2020-10-28 08:45:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:45:49,352 INFO L225 Difference]: With dead ends: 338 [2020-10-28 08:45:49,353 INFO L226 Difference]: Without dead ends: 154 [2020-10-28 08:45:49,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:45:49,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-28 08:45:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 144. [2020-10-28 08:45:49,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 08:45:49,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-10-28 08:45:49,370 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 127 [2020-10-28 08:45:49,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:45:49,370 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-10-28 08:45:49,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:45:49,370 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-10-28 08:45:49,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-28 08:45:49,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:45:49,372 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:45:49,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:45:49,372 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:45:49,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:45:49,373 INFO L82 PathProgramCache]: Analyzing trace with hash -2111778976, now seen corresponding path program 15 times [2020-10-28 08:45:49,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:45:49,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494237987] [2020-10-28 08:45:49,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:45:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:49,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:53,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:59,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:59,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-28 08:45:59,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:45:59,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9656 [2020-10-28 08:45:59,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:59,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:59,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 111 [2020-10-28 08:45:59,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:45:59,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-28 08:45:59,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:11,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:46:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:11,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:11,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:11,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:46:11,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:46:11,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:46:11,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:11,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:11,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:46:11,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:46:11,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:46:11,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:46:11,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494237987] [2020-10-28 08:46:11,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:46:11,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-10-28 08:46:11,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242710253] [2020-10-28 08:46:11,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-10-28 08:46:11,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:46:11,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-10-28 08:46:11,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=6741, Unknown=0, NotChecked=0, Total=7140 [2020-10-28 08:46:11,652 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 85 states. [2020-10-28 08:46:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:46:25,899 INFO L93 Difference]: Finished difference Result 394 states and 429 transitions. [2020-10-28 08:46:25,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-28 08:46:25,901 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 143 [2020-10-28 08:46:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:46:25,904 INFO L225 Difference]: With dead ends: 394 [2020-10-28 08:46:25,904 INFO L226 Difference]: Without dead ends: 387 [2020-10-28 08:46:25,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 15 SyntacticMatches, 16 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3888 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=611, Invalid=11599, Unknown=0, NotChecked=0, Total=12210 [2020-10-28 08:46:25,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-28 08:46:25,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 355. [2020-10-28 08:46:25,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-28 08:46:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 384 transitions. [2020-10-28 08:46:25,946 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 384 transitions. Word has length 143 [2020-10-28 08:46:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:46:25,947 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 384 transitions. [2020-10-28 08:46:25,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-10-28 08:46:25,947 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 384 transitions. [2020-10-28 08:46:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-28 08:46:25,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:46:25,949 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:46:25,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:46:25,949 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:46:25,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:46:25,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1762693790, now seen corresponding path program 16 times [2020-10-28 08:46:25,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:46:25,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701598166] [2020-10-28 08:46:25,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:46:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:26,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:26,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:26,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:26,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:26,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:26,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:28,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:30,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:30,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-28 08:46:30,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:46:30,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:46:30,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:30,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:30,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:46:30,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:46:30,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-28 08:46:30,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:31,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:46:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:31,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:31,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:31,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:46:31,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:46:31,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:46:31,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:31,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:31,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:46:31,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:46:31,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:46:31,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 08:46:31,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701598166] [2020-10-28 08:46:31,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:46:31,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:46:31,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370880424] [2020-10-28 08:46:31,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:46:31,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:46:31,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:46:31,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:46:31,245 INFO L87 Difference]: Start difference. First operand 355 states and 384 transitions. Second operand 16 states. [2020-10-28 08:46:32,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:46:32,415 INFO L93 Difference]: Finished difference Result 585 states and 632 transitions. [2020-10-28 08:46:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:46:32,416 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 145 [2020-10-28 08:46:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:46:32,418 INFO L225 Difference]: With dead ends: 585 [2020-10-28 08:46:32,418 INFO L226 Difference]: Without dead ends: 248 [2020-10-28 08:46:32,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:46:32,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-28 08:46:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2020-10-28 08:46:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-28 08:46:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 266 transitions. [2020-10-28 08:46:32,444 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 266 transitions. Word has length 145 [2020-10-28 08:46:32,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:46:32,444 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 266 transitions. [2020-10-28 08:46:32,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:46:32,444 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 266 transitions. [2020-10-28 08:46:32,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-28 08:46:32,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:46:32,445 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:46:32,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:46:32,446 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:46:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:46:32,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1250113884, now seen corresponding path program 17 times [2020-10-28 08:46:32,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:46:32,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190953181] [2020-10-28 08:46:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:46:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:32,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:32,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:32,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:32,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:32,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:32,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:37,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:37,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-28 08:46:37,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:46:37,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:46:37,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:37,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:37,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:46:37,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 08:46:37,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 08:46:37,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:37,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:46:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:37,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:37,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:37,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:46:37,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:46:37,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:46:37,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:37,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:37,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:46:37,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:46:37,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:46:37,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-10-28 08:46:37,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190953181] [2020-10-28 08:46:37,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:46:37,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:46:37,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106307993] [2020-10-28 08:46:37,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:46:37,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:46:37,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:46:37,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:46:37,760 INFO L87 Difference]: Start difference. First operand 247 states and 266 transitions. Second operand 16 states. [2020-10-28 08:46:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:46:40,509 INFO L93 Difference]: Finished difference Result 376 states and 411 transitions. [2020-10-28 08:46:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:46:40,510 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 147 [2020-10-28 08:46:40,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:46:40,513 INFO L225 Difference]: With dead ends: 376 [2020-10-28 08:46:40,513 INFO L226 Difference]: Without dead ends: 274 [2020-10-28 08:46:40,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:46:40,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-28 08:46:40,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 251. [2020-10-28 08:46:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-28 08:46:40,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 269 transitions. [2020-10-28 08:46:40,544 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 269 transitions. Word has length 147 [2020-10-28 08:46:40,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:46:40,545 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 269 transitions. [2020-10-28 08:46:40,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:46:40,545 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 269 transitions. [2020-10-28 08:46:40,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-28 08:46:40,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:46:40,546 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:46:40,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:46:40,547 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:46:40,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:46:40,547 INFO L82 PathProgramCache]: Analyzing trace with hash -743341980, now seen corresponding path program 18 times [2020-10-28 08:46:40,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:46:40,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667173097] [2020-10-28 08:46:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:46:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:40,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:40,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:40,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:40,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:40,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:41,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:45,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:45,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-28 08:46:45,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:46:45,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:46:45,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:45,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:45,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:46:45,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 08:46:45,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 08:46:45,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:45,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:46:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:45,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:45,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:45,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:46:45,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:46:45,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:46:45,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:45,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:45,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:46:45,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:46:45,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:46:45,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-10-28 08:46:45,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667173097] [2020-10-28 08:46:45,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:46:45,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:46:45,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218587305] [2020-10-28 08:46:45,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:46:45,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:46:45,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:46:45,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:46:45,847 INFO L87 Difference]: Start difference. First operand 251 states and 269 transitions. Second operand 16 states. [2020-10-28 08:46:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:46:47,484 INFO L93 Difference]: Finished difference Result 404 states and 431 transitions. [2020-10-28 08:46:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:46:47,485 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 147 [2020-10-28 08:46:47,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:46:47,487 INFO L225 Difference]: With dead ends: 404 [2020-10-28 08:46:47,487 INFO L226 Difference]: Without dead ends: 176 [2020-10-28 08:46:47,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:46:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-28 08:46:47,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2020-10-28 08:46:47,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-28 08:46:47,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 176 transitions. [2020-10-28 08:46:47,507 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 176 transitions. Word has length 147 [2020-10-28 08:46:47,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:46:47,507 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 176 transitions. [2020-10-28 08:46:47,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:46:47,507 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 176 transitions. [2020-10-28 08:46:47,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-28 08:46:47,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:46:47,509 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:46:47,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:46:47,509 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:46:47,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:46:47,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1347280842, now seen corresponding path program 19 times [2020-10-28 08:46:47,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:46:47,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243104355] [2020-10-28 08:46:47,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:46:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:47,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:54,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:54,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-28 08:46:54,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:46:54,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6373 [2020-10-28 08:46:54,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:54,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:54,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 128 [2020-10-28 08:46:54,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:46:54,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-28 08:46:54,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:00,449 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-28 08:47:01,559 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2020-10-28 08:47:01,826 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-10-28 08:47:02,187 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 31 [2020-10-28 08:47:04,798 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-10-28 08:47:06,145 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-10-28 08:47:06,428 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2020-10-28 08:47:07,524 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-10-28 08:47:07,849 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-10-28 08:47:08,152 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-10-28 08:47:08,444 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-28 08:47:08,733 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-28 08:47:09,336 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2020-10-28 08:47:09,696 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-28 08:47:10,034 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-10-28 08:47:10,382 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-28 08:47:10,721 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2020-10-28 08:47:11,063 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2020-10-28 08:47:11,403 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-10-28 08:47:11,732 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2020-10-28 08:47:12,068 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2020-10-28 08:47:12,403 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2020-10-28 08:47:12,751 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-28 08:47:13,103 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30