/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/loop-invgen/string_concat-noarr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:01:54,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:01:54,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:01:54,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:01:54,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:01:54,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:01:54,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:01:54,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:01:54,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:01:54,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:01:54,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:01:54,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:01:54,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:01:54,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:01:54,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:01:54,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:01:54,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:01:54,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:01:54,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:01:54,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:01:54,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:01:54,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:01:54,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:01:54,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:01:54,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:01:54,327 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:01:54,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:01:54,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:01:54,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:01:54,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:01:54,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:01:54,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:01:54,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:01:54,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:01:54,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:01:54,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:01:54,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:01:54,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:01:54,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:01:54,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:01:54,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:01:54,349 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 15:01:54,409 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:01:54,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:01:54,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:01:54,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:01:54,414 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:01:54,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:01:54,415 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:01:54,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:01:54,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:01:54,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:01:54,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:01:54,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:01:54,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:01:54,417 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:01:54,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:01:54,418 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:01:54,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:01:54,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:01:54,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:01:54,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:01:54,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:01:54,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:01:54,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:01:54,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:01:54,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:01:54,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:01:54,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:01:54,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:01:54,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:01:54,421 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:01:54,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:01:54,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:01:54,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:01:54,858 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:01:54,859 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:01:54,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2020-10-28 15:01:54,946 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2659e760c/d86f067f4df24d8581b23b4596d82def/FLAG0dc638535 [2020-10-28 15:01:55,564 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:01:55,564 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2020-10-28 15:01:55,573 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2659e760c/d86f067f4df24d8581b23b4596d82def/FLAG0dc638535 [2020-10-28 15:01:55,884 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2659e760c/d86f067f4df24d8581b23b4596d82def [2020-10-28 15:01:55,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:01:55,904 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:01:55,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:01:55,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:01:55,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:01:55,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:01:55" (1/1) ... [2020-10-28 15:01:55,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70ea40c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:55, skipping insertion in model container [2020-10-28 15:01:55,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:01:55" (1/1) ... [2020-10-28 15:01:55,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:01:55,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:01:56,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:01:56,123 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:01:56,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:01:56,156 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:01:56,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:56 WrapperNode [2020-10-28 15:01:56,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:01:56,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:01:56,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:01:56,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:01:56,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:56" (1/1) ... [2020-10-28 15:01:56,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:56" (1/1) ... [2020-10-28 15:01:56,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:56" (1/1) ... [2020-10-28 15:01:56,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:56" (1/1) ... [2020-10-28 15:01:56,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:56" (1/1) ... [2020-10-28 15:01:56,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:56" (1/1) ... [2020-10-28 15:01:56,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:56" (1/1) ... [2020-10-28 15:01:56,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:01:56,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:01:56,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:01:56,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:01:56,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:56" (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 15:01:56,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:01:56,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:01:56,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:01:56,351 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:01:56,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:01:56,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:01:56,351 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:01:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:01:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 15:01:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 15:01:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:01:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:01:56,353 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:01:56,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:01:56,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:01:56,353 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:01:56,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:01:56,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:01:56,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:01:56,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:01:56,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:01:56,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:01:56,821 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:01:56,822 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 15:01:56,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:01:56 BoogieIcfgContainer [2020-10-28 15:01:56,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:01:56,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:01:56,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:01:56,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:01:56,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:01:55" (1/3) ... [2020-10-28 15:01:56,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f5783f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:01:56, skipping insertion in model container [2020-10-28 15:01:56,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:56" (2/3) ... [2020-10-28 15:01:56,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f5783f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:01:56, skipping insertion in model container [2020-10-28 15:01:56,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:01:56" (3/3) ... [2020-10-28 15:01:56,835 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2020-10-28 15:01:56,850 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:01:56,858 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:01:56,872 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:01:56,921 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:01:56,922 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:01:56,922 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:01:56,922 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:01:56,922 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:01:56,922 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:01:56,922 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:01:56,923 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:01:56,949 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-28 15:01:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:01:56,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:56,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:56,959 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:56,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:56,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1023868445, now seen corresponding path program 1 times [2020-10-28 15:01:56,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:56,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681642864] [2020-10-28 15:01:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:57,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:57,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:57,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:57,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:57,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:57,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:01:57,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:01:57,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-28 15:01:57,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:57,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:57,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:57,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:01:57,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:57,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:01:57,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:57,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:57,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:57,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:57,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:57,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 15:01:57,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:57,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:57,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:57,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:57,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:57,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:57,778 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 15:01:57,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681642864] [2020-10-28 15:01:57,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:57,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:01:57,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599741084] [2020-10-28 15:01:57,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:01:57,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:57,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:01:57,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:01:57,814 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-10-28 15:01:57,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:57,877 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-10-28 15:01:57,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:01:57,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-28 15:01:57,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:57,888 INFO L225 Difference]: With dead ends: 50 [2020-10-28 15:01:57,888 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 15:01:57,892 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 15:01:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 15:01:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-28 15:01:57,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 15:01:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-28 15:01:57,937 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-28 15:01:57,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:57,938 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-28 15:01:57,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:01:57,938 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-28 15:01:57,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:01:57,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:57,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:57,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:01:57,940 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:57,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:57,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1179052024, now seen corresponding path program 1 times [2020-10-28 15:01:57,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:57,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011281461] [2020-10-28 15:01:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:57,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:58,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:58,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:58,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:01:58,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:01:58,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-28 15:01:58,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:58,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:58,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:01:58,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:58,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:01:58,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:58,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:58,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:58,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:58,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:58,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:58,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 15:01:58,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:58,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:58,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:58,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:58,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:58,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 15:01:58,245 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 15:01:58,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011281461] [2020-10-28 15:01:58,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:58,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:01:58,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159159206] [2020-10-28 15:01:58,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:01:58,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:58,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:01:58,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:01:58,259 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-28 15:01:58,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:58,492 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-28 15:01:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:01:58,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-28 15:01:58,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:58,494 INFO L225 Difference]: With dead ends: 33 [2020-10-28 15:01:58,494 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 15:01:58,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:01:58,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 15:01:58,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-28 15:01:58,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 15:01:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-28 15:01:58,504 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-28 15:01:58,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:58,504 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-28 15:01:58,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:01:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-28 15:01:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:01:58,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:58,506 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:58,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:01:58,506 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:58,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:58,507 INFO L82 PathProgramCache]: Analyzing trace with hash -125854589, now seen corresponding path program 1 times [2020-10-28 15:01:58,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:58,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761907573] [2020-10-28 15:01:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:58,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:58,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:58,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:58,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:01:58,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:01:58,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-28 15:01:58,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:58,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:58,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:01:58,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:58,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:01:58,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:58,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:58,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:58,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:58,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:58,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:58,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 15:01:58,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:58,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:58,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:58,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:58,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:58,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:58,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761907573] [2020-10-28 15:01:58,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:01:58,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:01:58,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407764573] [2020-10-28 15:01:58,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:01:58,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:58,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:01:58,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:01:58,952 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2020-10-28 15:01:59,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:59,198 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-10-28 15:01:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:01:59,199 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-28 15:01:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:59,202 INFO L225 Difference]: With dead ends: 42 [2020-10-28 15:01:59,202 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 15:01:59,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:01:59,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 15:01:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2020-10-28 15:01:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 15:01:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-28 15:01:59,210 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-10-28 15:01:59,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:59,211 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-28 15:01:59,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:01:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-28 15:01:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:01:59,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:59,213 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:59,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:01:59,213 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:59,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:59,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1615401410, now seen corresponding path program 2 times [2020-10-28 15:01:59,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:59,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928076115] [2020-10-28 15:01:59,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:59,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:59,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:59,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:59,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:01:59,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:01:59,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-28 15:01:59,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:59,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:59,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:01:59,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:59,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:01:59,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:59,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:59,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:59,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:59,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:59,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:59,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:01:59,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:59,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:59,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:59,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:59,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:59,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:59,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928076115] [2020-10-28 15:01:59,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:01:59,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:01:59,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773680630] [2020-10-28 15:01:59,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:01:59,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:59,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:01:59,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:01:59,624 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-10-28 15:01:59,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:59,930 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-10-28 15:01:59,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:01:59,930 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-28 15:01:59,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:59,932 INFO L225 Difference]: With dead ends: 47 [2020-10-28 15:01:59,932 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 15:01:59,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:01:59,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 15:01:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-10-28 15:01:59,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 15:01:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-28 15:01:59,940 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2020-10-28 15:01:59,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:59,941 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-28 15:01:59,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:01:59,941 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-28 15:01:59,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:01:59,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:59,942 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:59,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:01:59,942 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:59,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:59,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1449180473, now seen corresponding path program 3 times [2020-10-28 15:01:59,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:59,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065440569] [2020-10-28 15:01:59,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:59,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:59,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:00,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:02:00,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:00,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-28 15:02:00,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:00,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:00,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:02:00,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:00,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:02:00,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:00,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:00,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:00,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:00,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:00,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:02:00,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:00,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:00,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:00,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:00,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:00,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:00,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065440569] [2020-10-28 15:02:00,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:00,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:02:00,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766780159] [2020-10-28 15:02:00,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:02:00,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:00,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:02:00,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:02:00,345 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-10-28 15:02:00,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:00,640 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-10-28 15:02:00,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:02:00,641 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-28 15:02:00,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:00,642 INFO L225 Difference]: With dead ends: 52 [2020-10-28 15:02:00,642 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 15:02:00,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:02:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 15:02:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2020-10-28 15:02:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:02:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-28 15:02:00,650 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 25 [2020-10-28 15:02:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:00,650 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-28 15:02:00,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:02:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-28 15:02:00,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:02:00,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:00,652 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:00,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:02:00,652 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:00,653 INFO L82 PathProgramCache]: Analyzing trace with hash 164804980, now seen corresponding path program 4 times [2020-10-28 15:02:00,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:00,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114960161] [2020-10-28 15:02:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:00,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:00,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:02:00,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:00,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-28 15:02:00,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:00,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:00,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:02:00,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:00,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:02:00,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:01,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:01,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:01,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:01,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:01,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:01,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:01,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:01,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:01,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:01,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:01,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:01,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:01,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114960161] [2020-10-28 15:02:01,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:01,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:02:01,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553626246] [2020-10-28 15:02:01,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:02:01,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:01,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:02:01,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:02:01,050 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 10 states. [2020-10-28 15:02:01,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:01,441 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-28 15:02:01,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:02:01,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-28 15:02:01,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:01,444 INFO L225 Difference]: With dead ends: 57 [2020-10-28 15:02:01,444 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 15:02:01,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:02:01,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 15:02:01,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2020-10-28 15:02:01,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 15:02:01,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-28 15:02:01,457 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 27 [2020-10-28 15:02:01,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:01,459 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-28 15:02:01,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:02:01,460 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-28 15:02:01,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:02:01,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:01,462 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:01,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:02:01,462 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:01,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:01,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1464429841, now seen corresponding path program 5 times [2020-10-28 15:02:01,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:01,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696646699] [2020-10-28 15:02:01,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:01,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:01,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:01,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:01,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:02:01,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:01,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-10-28 15:02:01,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:01,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:01,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:02:01,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:01,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:02:01,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:01,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:01,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:01,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:01,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:01,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:01,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:01,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:01,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:01,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:01,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:01,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:01,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:01,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696646699] [2020-10-28 15:02:01,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:01,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:02:01,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8363384] [2020-10-28 15:02:01,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:02:01,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:01,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:02:01,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:02:01,975 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 11 states. [2020-10-28 15:02:02,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:02,373 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-28 15:02:02,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:02:02,374 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-28 15:02:02,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:02,375 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:02:02,375 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 15:02:02,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:02:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 15:02:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-10-28 15:02:02,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 15:02:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-28 15:02:02,382 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 29 [2020-10-28 15:02:02,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:02,383 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-28 15:02:02,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:02:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-28 15:02:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:02:02,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:02,384 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:02,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:02:02,385 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:02,385 INFO L82 PathProgramCache]: Analyzing trace with hash 503970218, now seen corresponding path program 6 times [2020-10-28 15:02:02,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:02,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910022714] [2020-10-28 15:02:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:02,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:02,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:02,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:02,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:02:02,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:02,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-10-28 15:02:02,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:02,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:02,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:02:02,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:02,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 15:02:02,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:02,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:02,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:02,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:02,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:02,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:02,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:02:02,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:02,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:02,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:02,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:02,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:02,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:02,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910022714] [2020-10-28 15:02:02,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:02,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:02:02,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373255578] [2020-10-28 15:02:02,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:02:02,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:02,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:02:02,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:02:02,961 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 12 states. [2020-10-28 15:02:03,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:03,475 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-10-28 15:02:03,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:02:03,475 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-28 15:02:03,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:03,476 INFO L225 Difference]: With dead ends: 67 [2020-10-28 15:02:03,476 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 15:02:03,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:02:03,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 15:02:03,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-10-28 15:02:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 15:02:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-28 15:02:03,495 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 31 [2020-10-28 15:02:03,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:03,495 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-28 15:02:03,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:02:03,495 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-28 15:02:03,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:02:03,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:03,497 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:03,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:02:03,497 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:03,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:03,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1944150619, now seen corresponding path program 7 times [2020-10-28 15:02:03,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:03,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114985811] [2020-10-28 15:02:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:03,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:03,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:03,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:03,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:02:03,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:03,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-28 15:02:03,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:03,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:03,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:02:03,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:03,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 15:02:03,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:03,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:03,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:03,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:03,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:03,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:03,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:03,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:03,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:03,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:03,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:03,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:03,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:03,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114985811] [2020-10-28 15:02:03,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:03,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:02:03,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591346845] [2020-10-28 15:02:03,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:02:03,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:03,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:02:03,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:02:03,824 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 13 states. [2020-10-28 15:02:04,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:04,442 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-10-28 15:02:04,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:02:04,443 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-28 15:02:04,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:04,444 INFO L225 Difference]: With dead ends: 72 [2020-10-28 15:02:04,444 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 15:02:04,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:02:04,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 15:02:04,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2020-10-28 15:02:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 15:02:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-28 15:02:04,462 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 33 [2020-10-28 15:02:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:04,463 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-28 15:02:04,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:02:04,463 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-28 15:02:04,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:02:04,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:04,467 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:04,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:02:04,467 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:04,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:04,468 INFO L82 PathProgramCache]: Analyzing trace with hash -946196768, now seen corresponding path program 8 times [2020-10-28 15:02:04,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:04,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763971843] [2020-10-28 15:02:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:04,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:04,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:04,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:04,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:02:04,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:04,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-28 15:02:04,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:04,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:04,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:02:04,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:04,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 15:02:04,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:05,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:05,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:05,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:05,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:05,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:02:05,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:05,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:05,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:05,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:05,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:05,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:05,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763971843] [2020-10-28 15:02:05,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:05,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:02:05,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026661798] [2020-10-28 15:02:05,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:02:05,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:05,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:02:05,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:02:05,064 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 14 states. [2020-10-28 15:02:05,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:05,722 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2020-10-28 15:02:05,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:02:05,722 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-28 15:02:05,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:05,723 INFO L225 Difference]: With dead ends: 77 [2020-10-28 15:02:05,723 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 15:02:05,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:02:05,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 15:02:05,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2020-10-28 15:02:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 15:02:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-10-28 15:02:05,732 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 35 [2020-10-28 15:02:05,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:05,732 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-28 15:02:05,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:02:05,732 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-10-28 15:02:05,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 15:02:05,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:05,734 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:05,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:02:05,734 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:05,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:05,735 INFO L82 PathProgramCache]: Analyzing trace with hash 309747035, now seen corresponding path program 9 times [2020-10-28 15:02:05,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:05,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256839718] [2020-10-28 15:02:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:05,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:06,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:06,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 15:02:06,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:06,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 596 [2020-10-28 15:02:06,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:06,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:06,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:02:06,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:06,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 15:02:06,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:06,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:06,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:06,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:06,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:06,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:06,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:06,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:06,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:06,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:06,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:06,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:06,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:06,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256839718] [2020-10-28 15:02:06,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:06,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:02:06,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513289341] [2020-10-28 15:02:06,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:02:06,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:06,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:02:06,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:02:06,530 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 15 states. [2020-10-28 15:02:07,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:07,208 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-10-28 15:02:07,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:02:07,209 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-28 15:02:07,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:07,210 INFO L225 Difference]: With dead ends: 80 [2020-10-28 15:02:07,210 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 15:02:07,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:02:07,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 15:02:07,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2020-10-28 15:02:07,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:02:07,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-10-28 15:02:07,231 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 37 [2020-10-28 15:02:07,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:07,231 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-10-28 15:02:07,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:02:07,232 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-10-28 15:02:07,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 15:02:07,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:07,233 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:07,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:02:07,233 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:07,234 INFO L82 PathProgramCache]: Analyzing trace with hash 385931542, now seen corresponding path program 10 times [2020-10-28 15:02:07,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:07,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306435664] [2020-10-28 15:02:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:07,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:07,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:07,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:07,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 15:02:07,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:07,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-28 15:02:07,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:07,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:07,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:02:07,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:07,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 15:02:07,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:07,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:07,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:07,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:07,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:07,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:07,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:07,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:07,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:07,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:07,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:07,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:07,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:07,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306435664] [2020-10-28 15:02:07,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:07,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:02:07,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732466857] [2020-10-28 15:02:07,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:02:07,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:07,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:02:07,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:02:07,885 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 16 states. [2020-10-28 15:02:08,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:08,590 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-28 15:02:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:02:08,591 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-28 15:02:08,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:08,592 INFO L225 Difference]: With dead ends: 87 [2020-10-28 15:02:08,592 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 15:02:08,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:02:08,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 15:02:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-10-28 15:02:08,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 15:02:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2020-10-28 15:02:08,601 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 39 [2020-10-28 15:02:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:08,601 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-10-28 15:02:08,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:02:08,601 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2020-10-28 15:02:08,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 15:02:08,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:08,603 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:08,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:02:08,603 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:08,603 INFO L82 PathProgramCache]: Analyzing trace with hash 584798737, now seen corresponding path program 11 times [2020-10-28 15:02:08,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:08,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590765757] [2020-10-28 15:02:08,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:08,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:08,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:09,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:09,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 15:02:09,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:09,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 658 [2020-10-28 15:02:09,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:09,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:09,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:02:09,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:09,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 15:02:09,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:09,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:09,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:09,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:09,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:09,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:09,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:09,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:09,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:09,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:09,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:09,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:09,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:09,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590765757] [2020-10-28 15:02:09,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:09,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:02:09,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470923637] [2020-10-28 15:02:09,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:02:09,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:09,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:02:09,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:02:09,478 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 17 states. [2020-10-28 15:02:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:10,220 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2020-10-28 15:02:10,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:02:10,221 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-28 15:02:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:10,222 INFO L225 Difference]: With dead ends: 92 [2020-10-28 15:02:10,222 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 15:02:10,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:02:10,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 15:02:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2020-10-28 15:02:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 15:02:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-28 15:02:10,227 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 41 [2020-10-28 15:02:10,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:10,227 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-28 15:02:10,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:02:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-28 15:02:10,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 15:02:10,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:10,228 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:10,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:02:10,229 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:10,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:10,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1577355188, now seen corresponding path program 12 times [2020-10-28 15:02:10,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:10,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918953339] [2020-10-28 15:02:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:10,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:10,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:10,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:10,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 15:02:10,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:10,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 545 [2020-10-28 15:02:10,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:10,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:10,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:02:10,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:10,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 15:02:10,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:11,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:11,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:11,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:11,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:11,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:11,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:11,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:11,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:11,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:11,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:11,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:11,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918953339] [2020-10-28 15:02:11,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:11,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:02:11,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927808285] [2020-10-28 15:02:11,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:02:11,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:11,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:02:11,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:02:11,048 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 18 states. [2020-10-28 15:02:11,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:11,907 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2020-10-28 15:02:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:02:11,907 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-28 15:02:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:11,908 INFO L225 Difference]: With dead ends: 97 [2020-10-28 15:02:11,909 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 15:02:11,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:02:11,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 15:02:11,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-10-28 15:02:11,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 15:02:11,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2020-10-28 15:02:11,928 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 43 [2020-10-28 15:02:11,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:11,928 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2020-10-28 15:02:11,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:02:11,928 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2020-10-28 15:02:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 15:02:11,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:11,929 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:11,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:02:11,930 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:11,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:11,930 INFO L82 PathProgramCache]: Analyzing trace with hash -643105849, now seen corresponding path program 13 times [2020-10-28 15:02:11,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:11,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877384292] [2020-10-28 15:02:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:11,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:12,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:12,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:12,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 15:02:12,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:12,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-28 15:02:12,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:12,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:12,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:02:12,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:12,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 15:02:12,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:13,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:13,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:13,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:13,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:13,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:13,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:13,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:13,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:13,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:13,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:13,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:13,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:13,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877384292] [2020-10-28 15:02:13,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:13,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:02:13,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004563944] [2020-10-28 15:02:13,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:02:13,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:13,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:02:13,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:02:13,062 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand 19 states. [2020-10-28 15:02:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:13,999 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2020-10-28 15:02:14,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:02:14,000 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-28 15:02:14,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:14,001 INFO L225 Difference]: With dead ends: 102 [2020-10-28 15:02:14,001 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 15:02:14,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=374, Invalid=816, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:02:14,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 15:02:14,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2020-10-28 15:02:14,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 15:02:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2020-10-28 15:02:14,009 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 45 [2020-10-28 15:02:14,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:14,009 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2020-10-28 15:02:14,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:02:14,010 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2020-10-28 15:02:14,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 15:02:14,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:14,011 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:14,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:02:14,011 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:14,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:14,012 INFO L82 PathProgramCache]: Analyzing trace with hash -477655934, now seen corresponding path program 14 times [2020-10-28 15:02:14,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:14,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851142236] [2020-10-28 15:02:14,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:14,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:14,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:14,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:14,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 15:02:14,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:14,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 801 [2020-10-28 15:02:14,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:14,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:14,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:02:14,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:14,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 15:02:14,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:15,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:15,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:15,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:15,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:15,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:15,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:15,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:15,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:15,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:15,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:15,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:15,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:15,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851142236] [2020-10-28 15:02:15,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:15,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:02:15,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707959596] [2020-10-28 15:02:15,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:02:15,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:15,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:02:15,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:02:15,096 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand 20 states. [2020-10-28 15:02:16,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:16,040 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2020-10-28 15:02:16,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:02:16,041 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-28 15:02:16,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:16,042 INFO L225 Difference]: With dead ends: 107 [2020-10-28 15:02:16,042 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 15:02:16,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=422, Invalid=910, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:02:16,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 15:02:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-10-28 15:02:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 15:02:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2020-10-28 15:02:16,047 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 47 [2020-10-28 15:02:16,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:16,048 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2020-10-28 15:02:16,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:02:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2020-10-28 15:02:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 15:02:16,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:16,049 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:16,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:02:16,049 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:16,050 INFO L82 PathProgramCache]: Analyzing trace with hash -394077571, now seen corresponding path program 15 times [2020-10-28 15:02:16,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:16,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493337444] [2020-10-28 15:02:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:16,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:16,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 15:02:16,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:16,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 686 [2020-10-28 15:02:16,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:16,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:16,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:02:16,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:16,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 15:02:16,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:17,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:17,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:17,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:17,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:17,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:17,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:17,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:17,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:17,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:17,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493337444] [2020-10-28 15:02:17,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:17,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:02:17,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93202118] [2020-10-28 15:02:17,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:02:17,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:17,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:02:17,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:02:17,071 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand 21 states. [2020-10-28 15:02:18,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:18,109 INFO L93 Difference]: Finished difference Result 112 states and 129 transitions. [2020-10-28 15:02:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:02:18,109 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-10-28 15:02:18,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:18,111 INFO L225 Difference]: With dead ends: 112 [2020-10-28 15:02:18,111 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 15:02:18,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=473, Invalid=1009, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:02:18,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 15:02:18,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2020-10-28 15:02:18,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 15:02:18,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2020-10-28 15:02:18,122 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 49 [2020-10-28 15:02:18,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:18,122 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2020-10-28 15:02:18,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:02:18,122 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2020-10-28 15:02:18,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 15:02:18,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:18,123 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:18,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:02:18,124 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:18,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:18,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1679649352, now seen corresponding path program 16 times [2020-10-28 15:02:18,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:18,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404240422] [2020-10-28 15:02:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:18,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:18,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:18,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:18,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 15:02:18,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:18,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 703 [2020-10-28 15:02:18,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:18,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:18,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:02:18,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:18,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 15:02:18,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:19,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:19,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:19,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:19,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:19,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:19,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:19,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:19,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:19,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:19,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:19,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:19,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:19,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404240422] [2020-10-28 15:02:19,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:19,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:02:19,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155622937] [2020-10-28 15:02:19,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:02:19,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:19,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:02:19,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:02:19,167 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand 22 states. [2020-10-28 15:02:20,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:20,264 INFO L93 Difference]: Finished difference Result 117 states and 135 transitions. [2020-10-28 15:02:20,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:02:20,264 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-28 15:02:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:20,266 INFO L225 Difference]: With dead ends: 117 [2020-10-28 15:02:20,266 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 15:02:20,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=527, Invalid=1113, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:02:20,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 15:02:20,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2020-10-28 15:02:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 15:02:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2020-10-28 15:02:20,274 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 51 [2020-10-28 15:02:20,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:20,274 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2020-10-28 15:02:20,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:02:20,275 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2020-10-28 15:02:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 15:02:20,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:20,276 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:20,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:02:20,276 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:20,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash -163549645, now seen corresponding path program 17 times [2020-10-28 15:02:20,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:20,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910525407] [2020-10-28 15:02:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:20,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:20,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:20,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:20,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:02:20,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:20,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-28 15:02:20,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:20,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:20,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:02:20,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:20,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 15:02:20,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:21,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:21,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:21,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:21,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:21,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:21,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:21,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:21,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:21,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:21,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:21,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:21,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:21,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910525407] [2020-10-28 15:02:21,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:21,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:02:21,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489172610] [2020-10-28 15:02:21,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:02:21,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:21,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:02:21,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:02:21,320 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand 23 states. [2020-10-28 15:02:22,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:22,557 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2020-10-28 15:02:22,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:02:22,557 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-28 15:02:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:22,558 INFO L225 Difference]: With dead ends: 122 [2020-10-28 15:02:22,558 INFO L226 Difference]: Without dead ends: 114 [2020-10-28 15:02:22,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=584, Invalid=1222, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:02:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-28 15:02:22,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2020-10-28 15:02:22,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 15:02:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2020-10-28 15:02:22,564 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 53 [2020-10-28 15:02:22,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:22,565 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2020-10-28 15:02:22,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 15:02:22,565 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2020-10-28 15:02:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 15:02:22,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:22,566 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:22,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:02:22,566 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:22,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:22,567 INFO L82 PathProgramCache]: Analyzing trace with hash 814355438, now seen corresponding path program 18 times [2020-10-28 15:02:22,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:22,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456034940] [2020-10-28 15:02:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:22,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:22,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:23,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:23,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 15:02:23,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:23,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-28 15:02:23,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:23,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:23,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 15:02:23,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:23,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 15:02:23,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:23,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:23,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:23,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:23,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:23,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:23,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:23,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:23,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:23,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:23,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:23,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:23,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:23,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456034940] [2020-10-28 15:02:23,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:23,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 15:02:23,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885254252] [2020-10-28 15:02:23,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 15:02:23,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:23,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 15:02:23,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:02:23,574 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand 24 states. [2020-10-28 15:02:24,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:24,877 INFO L93 Difference]: Finished difference Result 127 states and 147 transitions. [2020-10-28 15:02:24,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:02:24,877 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-28 15:02:24,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:24,879 INFO L225 Difference]: With dead ends: 127 [2020-10-28 15:02:24,880 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 15:02:24,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=644, Invalid=1336, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:02:24,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 15:02:24,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2020-10-28 15:02:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 15:02:24,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 131 transitions. [2020-10-28 15:02:24,886 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 131 transitions. Word has length 55 [2020-10-28 15:02:24,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:24,886 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 131 transitions. [2020-10-28 15:02:24,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 15:02:24,886 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 131 transitions. [2020-10-28 15:02:24,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 15:02:24,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:24,887 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:24,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:02:24,888 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:24,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:24,888 INFO L82 PathProgramCache]: Analyzing trace with hash -16697623, now seen corresponding path program 19 times [2020-10-28 15:02:24,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:24,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134552561] [2020-10-28 15:02:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:24,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:25,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:25,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:25,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 15:02:25,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:25,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-10-28 15:02:25,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:25,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:25,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 15:02:25,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:25,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 15:02:25,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:26,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:26,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:26,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:26,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:26,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:26,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:26,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:26,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:26,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:26,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:26,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:26,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:26,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134552561] [2020-10-28 15:02:26,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:26,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 15:02:26,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078562403] [2020-10-28 15:02:26,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 15:02:26,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:26,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 15:02:26,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:02:26,353 INFO L87 Difference]: Start difference. First operand 112 states and 131 transitions. Second operand 25 states. [2020-10-28 15:02:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:27,684 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2020-10-28 15:02:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:02:27,685 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-10-28 15:02:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:27,686 INFO L225 Difference]: With dead ends: 132 [2020-10-28 15:02:27,686 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 15:02:27,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 15:02:27,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 15:02:27,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2020-10-28 15:02:27,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 15:02:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2020-10-28 15:02:27,693 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 57 [2020-10-28 15:02:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:27,693 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2020-10-28 15:02:27,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 15:02:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2020-10-28 15:02:27,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 15:02:27,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:27,694 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:27,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:02:27,694 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:27,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:27,695 INFO L82 PathProgramCache]: Analyzing trace with hash 205227812, now seen corresponding path program 20 times [2020-10-28 15:02:27,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:27,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751949584] [2020-10-28 15:02:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:27,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:27,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:28,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:28,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 15:02:28,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:28,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-28 15:02:28,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:28,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:28,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 15:02:28,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:28,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 15:02:28,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:29,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:29,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:29,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:29,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:29,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:29,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:29,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:29,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:29,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:29,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:29,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:29,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:29,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751949584] [2020-10-28 15:02:29,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:29,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 15:02:29,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436801164] [2020-10-28 15:02:29,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 15:02:29,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:29,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 15:02:29,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:02:29,074 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand 26 states. [2020-10-28 15:02:30,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:30,571 INFO L93 Difference]: Finished difference Result 137 states and 159 transitions. [2020-10-28 15:02:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:02:30,576 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-28 15:02:30,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:30,577 INFO L225 Difference]: With dead ends: 137 [2020-10-28 15:02:30,577 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 15:02:30,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=773, Invalid=1579, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 15:02:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 15:02:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 122. [2020-10-28 15:02:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 15:02:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2020-10-28 15:02:30,583 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 59 [2020-10-28 15:02:30,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:30,584 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2020-10-28 15:02:30,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 15:02:30,584 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2020-10-28 15:02:30,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 15:02:30,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:30,585 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:30,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:02:30,585 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:30,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:30,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1272793953, now seen corresponding path program 21 times [2020-10-28 15:02:30,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:30,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134860960] [2020-10-28 15:02:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:30,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:30,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:31,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:31,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 15:02:31,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:31,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 815 [2020-10-28 15:02:31,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:31,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:31,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 15:02:31,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:31,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 15:02:31,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:31,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:31,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:31,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:31,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:31,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:31,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:31,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:31,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:31,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:31,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:31,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:31,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:32,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134860960] [2020-10-28 15:02:32,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:32,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 15:02:32,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489472669] [2020-10-28 15:02:32,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 15:02:32,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:32,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 15:02:32,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:02:32,002 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand 27 states. [2020-10-28 15:02:33,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:33,521 INFO L93 Difference]: Finished difference Result 142 states and 165 transitions. [2020-10-28 15:02:33,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 15:02:33,523 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-28 15:02:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:33,524 INFO L225 Difference]: With dead ends: 142 [2020-10-28 15:02:33,524 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 15:02:33,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=842, Invalid=1708, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 15:02:33,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 15:02:33,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2020-10-28 15:02:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 15:02:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 149 transitions. [2020-10-28 15:02:33,530 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 149 transitions. Word has length 61 [2020-10-28 15:02:33,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:33,530 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 149 transitions. [2020-10-28 15:02:33,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 15:02:33,530 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 149 transitions. [2020-10-28 15:02:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 15:02:33,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:33,531 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:33,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:02:33,531 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:33,532 INFO L82 PathProgramCache]: Analyzing trace with hash -17535142, now seen corresponding path program 22 times [2020-10-28 15:02:33,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:33,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554974387] [2020-10-28 15:02:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:33,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:33,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:34,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:34,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 15:02:34,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:34,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-28 15:02:34,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:34,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:34,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 15:02:34,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:34,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 15:02:34,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:34,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:34,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:34,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:34,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:34,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:34,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:02:34,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:34,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:34,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:34,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:34,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:34,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:34,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554974387] [2020-10-28 15:02:34,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:34,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 15:02:34,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137979893] [2020-10-28 15:02:34,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 15:02:34,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:34,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 15:02:34,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:02:34,963 INFO L87 Difference]: Start difference. First operand 127 states and 149 transitions. Second operand 28 states. [2020-10-28 15:02:36,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:36,654 INFO L93 Difference]: Finished difference Result 147 states and 171 transitions. [2020-10-28 15:02:36,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:02:36,655 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-28 15:02:36,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:36,656 INFO L225 Difference]: With dead ends: 147 [2020-10-28 15:02:36,657 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 15:02:36,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=914, Invalid=1842, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 15:02:36,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 15:02:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 132. [2020-10-28 15:02:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 15:02:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2020-10-28 15:02:36,664 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 63 [2020-10-28 15:02:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:36,664 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2020-10-28 15:02:36,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 15:02:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2020-10-28 15:02:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 15:02:36,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:36,665 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:36,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:02:36,666 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:36,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:36,666 INFO L82 PathProgramCache]: Analyzing trace with hash -599627947, now seen corresponding path program 23 times [2020-10-28 15:02:36,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:36,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409997121] [2020-10-28 15:02:36,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:36,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:36,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:37,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:37,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 15:02:37,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:37,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-10-28 15:02:37,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:37,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:37,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 15:02:37,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:37,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 15:02:37,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:38,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:38,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:38,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:38,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:38,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:38,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:38,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:38,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:38,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:38,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:38,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:38,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:38,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409997121] [2020-10-28 15:02:38,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:38,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 15:02:38,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72109988] [2020-10-28 15:02:38,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 15:02:38,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:38,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 15:02:38,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:02:38,251 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand 29 states. [2020-10-28 15:02:39,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:39,962 INFO L93 Difference]: Finished difference Result 152 states and 177 transitions. [2020-10-28 15:02:39,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 15:02:39,963 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2020-10-28 15:02:39,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:39,964 INFO L225 Difference]: With dead ends: 152 [2020-10-28 15:02:39,965 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 15:02:39,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=989, Invalid=1981, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 15:02:39,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 15:02:39,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2020-10-28 15:02:39,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 15:02:39,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 161 transitions. [2020-10-28 15:02:39,971 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 161 transitions. Word has length 65 [2020-10-28 15:02:39,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:39,971 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 161 transitions. [2020-10-28 15:02:39,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 15:02:39,972 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 161 transitions. [2020-10-28 15:02:39,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 15:02:39,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:39,973 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:39,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:02:39,973 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:39,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:39,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1645065072, now seen corresponding path program 24 times [2020-10-28 15:02:39,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:39,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691696458] [2020-10-28 15:02:39,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:39,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:40,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:40,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:40,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 15:02:40,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:40,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-10-28 15:02:40,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:40,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:40,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 15:02:40,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:40,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 15:02:40,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:41,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:41,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:41,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:41,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:41,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:41,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:41,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:41,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:41,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:41,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:41,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:41,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:41,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691696458] [2020-10-28 15:02:41,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:41,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 15:02:41,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102157405] [2020-10-28 15:02:41,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 15:02:41,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:41,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 15:02:41,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-28 15:02:41,635 INFO L87 Difference]: Start difference. First operand 137 states and 161 transitions. Second operand 30 states. [2020-10-28 15:02:43,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:43,481 INFO L93 Difference]: Finished difference Result 155 states and 181 transitions. [2020-10-28 15:02:43,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 15:02:43,481 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-28 15:02:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:43,483 INFO L225 Difference]: With dead ends: 155 [2020-10-28 15:02:43,483 INFO L226 Difference]: Without dead ends: 147 [2020-10-28 15:02:43,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1067, Invalid=2125, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 15:02:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-28 15:02:43,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2020-10-28 15:02:43,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 15:02:43,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 167 transitions. [2020-10-28 15:02:43,490 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 167 transitions. Word has length 67 [2020-10-28 15:02:43,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:43,490 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 167 transitions. [2020-10-28 15:02:43,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 15:02:43,491 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 167 transitions. [2020-10-28 15:02:43,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 15:02:43,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:43,492 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:43,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:02:43,492 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:43,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:43,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1287794933, now seen corresponding path program 25 times [2020-10-28 15:02:43,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:43,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766436786] [2020-10-28 15:02:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:43,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:43,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:44,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:44,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 15:02:44,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:44,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 800 [2020-10-28 15:02:44,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:44,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:44,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 15:02:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 15:02:44,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:44,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:44,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:44,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:44,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:44,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:44,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:44,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:44,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:44,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:44,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:44,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:44,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:44,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766436786] [2020-10-28 15:02:44,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:44,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 15:02:44,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445989104] [2020-10-28 15:02:44,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 15:02:44,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:44,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 15:02:44,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:02:44,933 INFO L87 Difference]: Start difference. First operand 142 states and 167 transitions. Second operand 31 states. [2020-10-28 15:02:46,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:46,824 INFO L93 Difference]: Finished difference Result 162 states and 189 transitions. [2020-10-28 15:02:46,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 15:02:46,825 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2020-10-28 15:02:46,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:46,826 INFO L225 Difference]: With dead ends: 162 [2020-10-28 15:02:46,827 INFO L226 Difference]: Without dead ends: 154 [2020-10-28 15:02:46,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1148, Invalid=2274, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 15:02:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-28 15:02:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 147. [2020-10-28 15:02:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-28 15:02:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 173 transitions. [2020-10-28 15:02:46,834 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 173 transitions. Word has length 69 [2020-10-28 15:02:46,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:46,835 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 173 transitions. [2020-10-28 15:02:46,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 15:02:46,835 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 173 transitions. [2020-10-28 15:02:46,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 15:02:46,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:46,836 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:46,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:02:46,836 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:46,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:46,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1548575034, now seen corresponding path program 26 times [2020-10-28 15:02:46,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:46,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788711568] [2020-10-28 15:02:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:46,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:47,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:47,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:47,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 15:02:47,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:47,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 819 [2020-10-28 15:02:47,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:47,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:47,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 15:02:47,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:47,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 15:02:47,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:48,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:48,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:48,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:48,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:48,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:48,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:02:48,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:48,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:48,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:48,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:48,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:48,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:48,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788711568] [2020-10-28 15:02:48,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:48,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 15:02:48,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772765863] [2020-10-28 15:02:48,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 15:02:48,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:48,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 15:02:48,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:02:48,328 INFO L87 Difference]: Start difference. First operand 147 states and 173 transitions. Second operand 32 states. [2020-10-28 15:02:50,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:50,314 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2020-10-28 15:02:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 15:02:50,315 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-28 15:02:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:50,317 INFO L225 Difference]: With dead ends: 167 [2020-10-28 15:02:50,317 INFO L226 Difference]: Without dead ends: 159 [2020-10-28 15:02:50,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1232, Invalid=2428, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 15:02:50,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-28 15:02:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2020-10-28 15:02:50,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-28 15:02:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 179 transitions. [2020-10-28 15:02:50,322 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 179 transitions. Word has length 71 [2020-10-28 15:02:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:50,323 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 179 transitions. [2020-10-28 15:02:50,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 15:02:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 179 transitions. [2020-10-28 15:02:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 15:02:50,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:50,324 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:50,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:02:50,324 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:50,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1244818369, now seen corresponding path program 27 times [2020-10-28 15:02:50,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:50,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670548239] [2020-10-28 15:02:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:50,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:50,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:51,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:51,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 15:02:51,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:51,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1258 [2020-10-28 15:02:51,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:51,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:51,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 15:02:51,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:51,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 15:02:51,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:52,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:52,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:52,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:52,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:52,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:52,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:52,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:52,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:52,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:52,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:52,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:52,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:52,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670548239] [2020-10-28 15:02:52,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:52,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 15:02:52,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192292184] [2020-10-28 15:02:52,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 15:02:52,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:52,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 15:02:52,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:02:52,323 INFO L87 Difference]: Start difference. First operand 152 states and 179 transitions. Second operand 33 states. [2020-10-28 15:02:54,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:54,418 INFO L93 Difference]: Finished difference Result 172 states and 201 transitions. [2020-10-28 15:02:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 15:02:54,419 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-10-28 15:02:54,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:54,420 INFO L225 Difference]: With dead ends: 172 [2020-10-28 15:02:54,420 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 15:02:54,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1319, Invalid=2587, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 15:02:54,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 15:02:54,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 157. [2020-10-28 15:02:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-28 15:02:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 185 transitions. [2020-10-28 15:02:54,428 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 185 transitions. Word has length 73 [2020-10-28 15:02:54,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:54,428 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 185 transitions. [2020-10-28 15:02:54,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 15:02:54,429 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 185 transitions. [2020-10-28 15:02:54,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 15:02:54,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:54,429 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:54,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:02:54,430 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:54,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:54,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1341318652, now seen corresponding path program 28 times [2020-10-28 15:02:54,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:54,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297736761] [2020-10-28 15:02:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:54,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:54,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:55,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:55,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 15:02:55,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:55,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1109 [2020-10-28 15:02:55,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:55,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:55,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 15:02:55,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:55,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 15:02:55,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:56,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:56,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:56,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:56,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:56,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:56,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:56,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:56,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:56,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:56,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:56,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:56,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:56,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297736761] [2020-10-28 15:02:56,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:56,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 15:02:56,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066768534] [2020-10-28 15:02:56,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 15:02:56,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:56,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 15:02:56,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 15:02:56,309 INFO L87 Difference]: Start difference. First operand 157 states and 185 transitions. Second operand 34 states. [2020-10-28 15:02:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:58,528 INFO L93 Difference]: Finished difference Result 177 states and 207 transitions. [2020-10-28 15:02:58,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 15:02:58,530 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-28 15:02:58,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:58,532 INFO L225 Difference]: With dead ends: 177 [2020-10-28 15:02:58,532 INFO L226 Difference]: Without dead ends: 169 [2020-10-28 15:02:58,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1409, Invalid=2751, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 15:02:58,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-28 15:02:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 162. [2020-10-28 15:02:58,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 15:02:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 191 transitions. [2020-10-28 15:02:58,540 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 191 transitions. Word has length 75 [2020-10-28 15:02:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:58,540 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 191 transitions. [2020-10-28 15:02:58,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 15:02:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 191 transitions. [2020-10-28 15:02:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 15:02:58,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:58,542 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:58,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:02:58,542 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:58,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:58,549 INFO L82 PathProgramCache]: Analyzing trace with hash -411189897, now seen corresponding path program 29 times [2020-10-28 15:02:58,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:58,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009406306] [2020-10-28 15:02:58,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:58,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:58,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:00,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:00,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 15:03:00,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:00,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1574 [2020-10-28 15:03:00,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:00,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:00,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 15:03:00,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:03:00,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 15:03:00,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:00,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:00,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:00,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:00,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:00,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:00,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:03:00,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:00,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:00,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:00,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:00,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:00,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:00,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009406306] [2020-10-28 15:03:00,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:00,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 15:03:00,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749061933] [2020-10-28 15:03:00,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 15:03:00,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:00,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 15:03:00,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:03:00,977 INFO L87 Difference]: Start difference. First operand 162 states and 191 transitions. Second operand 35 states. [2020-10-28 15:03:03,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:03,306 INFO L93 Difference]: Finished difference Result 182 states and 213 transitions. [2020-10-28 15:03:03,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 15:03:03,308 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2020-10-28 15:03:03,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:03,309 INFO L225 Difference]: With dead ends: 182 [2020-10-28 15:03:03,309 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 15:03:03,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1502, Invalid=2920, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 15:03:03,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 15:03:03,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 167. [2020-10-28 15:03:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-28 15:03:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 197 transitions. [2020-10-28 15:03:03,315 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 197 transitions. Word has length 77 [2020-10-28 15:03:03,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:03,315 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 197 transitions. [2020-10-28 15:03:03,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 15:03:03,315 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 197 transitions. [2020-10-28 15:03:03,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 15:03:03,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:03,316 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:03,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:03:03,316 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:03,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:03,317 INFO L82 PathProgramCache]: Analyzing trace with hash -944725454, now seen corresponding path program 30 times [2020-10-28 15:03:03,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:03,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395889352] [2020-10-28 15:03:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:03,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:03,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:04,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:04,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 15:03:04,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:04,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1397 [2020-10-28 15:03:04,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:04,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:04,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 15:03:04,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:03:04,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 15:03:04,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:05,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:05,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:05,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:05,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:05,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:05,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:05,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:05,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:05,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:05,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:05,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:05,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:05,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395889352] [2020-10-28 15:03:05,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:05,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 15:03:05,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737110940] [2020-10-28 15:03:05,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 15:03:05,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:05,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 15:03:05,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 15:03:05,621 INFO L87 Difference]: Start difference. First operand 167 states and 197 transitions. Second operand 36 states. [2020-10-28 15:03:08,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:08,154 INFO L93 Difference]: Finished difference Result 187 states and 219 transitions. [2020-10-28 15:03:08,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 15:03:08,160 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2020-10-28 15:03:08,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:08,161 INFO L225 Difference]: With dead ends: 187 [2020-10-28 15:03:08,161 INFO L226 Difference]: Without dead ends: 179 [2020-10-28 15:03:08,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1598, Invalid=3094, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 15:03:08,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-28 15:03:08,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2020-10-28 15:03:08,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-28 15:03:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 203 transitions. [2020-10-28 15:03:08,168 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 203 transitions. Word has length 79 [2020-10-28 15:03:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:08,169 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 203 transitions. [2020-10-28 15:03:08,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 15:03:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 203 transitions. [2020-10-28 15:03:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 15:03:08,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:08,170 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:08,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 15:03:08,170 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:08,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:08,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1723679789, now seen corresponding path program 31 times [2020-10-28 15:03:08,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:08,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112186683] [2020-10-28 15:03:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:08,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:08,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:09,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:09,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 15:03:09,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:09,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-10-28 15:03:09,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:09,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:09,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 15:03:09,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:03:09,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 15:03:09,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:10,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:10,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:10,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:10,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:10,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:10,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:03:10,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:10,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:10,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:10,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:10,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:10,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:10,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112186683] [2020-10-28 15:03:10,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:10,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 15:03:10,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550426547] [2020-10-28 15:03:10,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 15:03:10,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:10,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 15:03:10,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:03:10,068 INFO L87 Difference]: Start difference. First operand 172 states and 203 transitions. Second operand 37 states. [2020-10-28 15:03:12,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:12,690 INFO L93 Difference]: Finished difference Result 192 states and 225 transitions. [2020-10-28 15:03:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 15:03:12,691 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 81 [2020-10-28 15:03:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:12,693 INFO L225 Difference]: With dead ends: 192 [2020-10-28 15:03:12,693 INFO L226 Difference]: Without dead ends: 184 [2020-10-28 15:03:12,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1697, Invalid=3273, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 15:03:12,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-28 15:03:12,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 177. [2020-10-28 15:03:12,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-28 15:03:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 209 transitions. [2020-10-28 15:03:12,700 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 209 transitions. Word has length 81 [2020-10-28 15:03:12,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:12,700 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 209 transitions. [2020-10-28 15:03:12,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 15:03:12,701 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 209 transitions. [2020-10-28 15:03:12,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 15:03:12,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:12,702 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:12,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 15:03:12,702 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:12,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:12,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1965642600, now seen corresponding path program 32 times [2020-10-28 15:03:12,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:12,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406821387] [2020-10-28 15:03:12,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:12,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:13,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:14,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:14,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 15:03:14,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:14,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1345 [2020-10-28 15:03:14,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:14,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:14,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 15:03:14,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:03:14,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 15:03:14,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:15,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:15,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:15,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:15,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:15,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:15,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:15,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:15,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:15,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:15,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:15,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:15,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:15,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406821387] [2020-10-28 15:03:15,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:15,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 15:03:15,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885270778] [2020-10-28 15:03:15,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 15:03:15,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:15,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 15:03:15,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 15:03:15,146 INFO L87 Difference]: Start difference. First operand 177 states and 209 transitions. Second operand 38 states. [2020-10-28 15:03:17,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:17,794 INFO L93 Difference]: Finished difference Result 197 states and 231 transitions. [2020-10-28 15:03:17,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 15:03:17,795 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2020-10-28 15:03:17,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:17,796 INFO L225 Difference]: With dead ends: 197 [2020-10-28 15:03:17,797 INFO L226 Difference]: Without dead ends: 189 [2020-10-28 15:03:17,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1799, Invalid=3457, Unknown=0, NotChecked=0, Total=5256 [2020-10-28 15:03:17,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-28 15:03:17,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 182. [2020-10-28 15:03:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-28 15:03:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 215 transitions. [2020-10-28 15:03:17,803 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 215 transitions. Word has length 83 [2020-10-28 15:03:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:17,803 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 215 transitions. [2020-10-28 15:03:17,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 15:03:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 215 transitions. [2020-10-28 15:03:17,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 15:03:17,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:17,805 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:17,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 15:03:17,805 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:17,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1731297309, now seen corresponding path program 33 times [2020-10-28 15:03:17,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:17,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34889273] [2020-10-28 15:03:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:17,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:18,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:18,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:18,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 15:03:18,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:18,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1088 [2020-10-28 15:03:18,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:18,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:18,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 15:03:18,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:03:18,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 15:03:18,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:19,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:19,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:19,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:19,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:19,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:19,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:19,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:19,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:19,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:19,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:19,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:19,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:19,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34889273] [2020-10-28 15:03:19,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:19,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 15:03:19,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549727116] [2020-10-28 15:03:19,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 15:03:19,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:19,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 15:03:19,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:03:19,906 INFO L87 Difference]: Start difference. First operand 182 states and 215 transitions. Second operand 39 states. [2020-10-28 15:03:22,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:22,558 INFO L93 Difference]: Finished difference Result 202 states and 237 transitions. [2020-10-28 15:03:22,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 15:03:22,559 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 85 [2020-10-28 15:03:22,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:22,561 INFO L225 Difference]: With dead ends: 202 [2020-10-28 15:03:22,561 INFO L226 Difference]: Without dead ends: 194 [2020-10-28 15:03:22,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1904, Invalid=3646, Unknown=0, NotChecked=0, Total=5550 [2020-10-28 15:03:22,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-28 15:03:22,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 187. [2020-10-28 15:03:22,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-28 15:03:22,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 221 transitions. [2020-10-28 15:03:22,568 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 221 transitions. Word has length 85 [2020-10-28 15:03:22,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:22,568 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 221 transitions. [2020-10-28 15:03:22,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 15:03:22,568 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 221 transitions. [2020-10-28 15:03:22,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 15:03:22,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:22,569 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:22,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 15:03:22,570 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:22,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:22,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1742371230, now seen corresponding path program 34 times [2020-10-28 15:03:22,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:22,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413160296] [2020-10-28 15:03:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:22,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:23,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:24,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:24,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 15:03:24,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:24,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1436 [2020-10-28 15:03:24,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:24,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:24,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 15:03:24,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:03:24,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 15:03:24,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:25,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:25,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:25,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:25,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:25,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:25,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:25,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:25,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:25,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:25,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:25,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:25,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:25,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413160296] [2020-10-28 15:03:25,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:25,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 15:03:25,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004233265] [2020-10-28 15:03:25,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 15:03:25,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:25,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 15:03:25,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 15:03:25,100 INFO L87 Difference]: Start difference. First operand 187 states and 221 transitions. Second operand 40 states. [2020-10-28 15:03:28,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:28,065 INFO L93 Difference]: Finished difference Result 207 states and 243 transitions. [2020-10-28 15:03:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 15:03:28,066 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 87 [2020-10-28 15:03:28,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:28,068 INFO L225 Difference]: With dead ends: 207 [2020-10-28 15:03:28,068 INFO L226 Difference]: Without dead ends: 199 [2020-10-28 15:03:28,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2012, Invalid=3840, Unknown=0, NotChecked=0, Total=5852 [2020-10-28 15:03:28,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-28 15:03:28,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 192. [2020-10-28 15:03:28,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-28 15:03:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 227 transitions. [2020-10-28 15:03:28,075 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 227 transitions. Word has length 87 [2020-10-28 15:03:28,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:28,076 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 227 transitions. [2020-10-28 15:03:28,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 15:03:28,076 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 227 transitions. [2020-10-28 15:03:28,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 15:03:28,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:28,077 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:28,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 15:03:28,077 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:28,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:28,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1546719079, now seen corresponding path program 35 times [2020-10-28 15:03:28,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:28,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830868149] [2020-10-28 15:03:28,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:28,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:28,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:30,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:30,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 15:03:30,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:30,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1902 [2020-10-28 15:03:30,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:30,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:30,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 15:03:30,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:03:30,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 15:03:30,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:31,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:31,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:31,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:31,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:31,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:31,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:03:31,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:31,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:31,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:31,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:31,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:31,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:31,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830868149] [2020-10-28 15:03:31,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:31,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 15:03:31,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589003758] [2020-10-28 15:03:31,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 15:03:31,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:31,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 15:03:31,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:03:31,069 INFO L87 Difference]: Start difference. First operand 192 states and 227 transitions. Second operand 41 states. [2020-10-28 15:03:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:34,115 INFO L93 Difference]: Finished difference Result 212 states and 249 transitions. [2020-10-28 15:03:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 15:03:34,116 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 89 [2020-10-28 15:03:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:34,118 INFO L225 Difference]: With dead ends: 212 [2020-10-28 15:03:34,118 INFO L226 Difference]: Without dead ends: 204 [2020-10-28 15:03:34,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2123, Invalid=4039, Unknown=0, NotChecked=0, Total=6162 [2020-10-28 15:03:34,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-28 15:03:34,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 197. [2020-10-28 15:03:34,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-28 15:03:34,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 233 transitions. [2020-10-28 15:03:34,129 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 233 transitions. Word has length 89 [2020-10-28 15:03:34,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:34,129 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 233 transitions. [2020-10-28 15:03:34,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 15:03:34,129 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 233 transitions. [2020-10-28 15:03:34,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 15:03:34,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:34,130 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:34,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 15:03:34,130 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:34,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:34,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1266576172, now seen corresponding path program 36 times [2020-10-28 15:03:34,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:34,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631903742] [2020-10-28 15:03:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:34,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:34,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:35,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:35,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 15:03:35,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:35,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1358 [2020-10-28 15:03:35,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:35,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:35,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 15:03:35,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:03:35,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 15:03:35,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:36,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:36,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:36,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:36,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:36,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:36,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:03:36,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:36,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:36,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:36,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:36,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:36,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:36,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631903742] [2020-10-28 15:03:36,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:36,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 15:03:36,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146214398] [2020-10-28 15:03:36,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 15:03:36,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:36,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 15:03:36,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 15:03:36,683 INFO L87 Difference]: Start difference. First operand 197 states and 233 transitions. Second operand 42 states. [2020-10-28 15:03:39,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:39,740 INFO L93 Difference]: Finished difference Result 217 states and 255 transitions. [2020-10-28 15:03:39,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 15:03:39,740 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 91 [2020-10-28 15:03:39,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:39,742 INFO L225 Difference]: With dead ends: 217 [2020-10-28 15:03:39,742 INFO L226 Difference]: Without dead ends: 209 [2020-10-28 15:03:39,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2237, Invalid=4243, Unknown=0, NotChecked=0, Total=6480 [2020-10-28 15:03:39,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-28 15:03:39,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 202. [2020-10-28 15:03:39,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-28 15:03:39,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 239 transitions. [2020-10-28 15:03:39,750 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 239 transitions. Word has length 91 [2020-10-28 15:03:39,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:39,750 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 239 transitions. [2020-10-28 15:03:39,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 15:03:39,750 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 239 transitions. [2020-10-28 15:03:39,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 15:03:39,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:39,751 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:39,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 15:03:39,752 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:39,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:39,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1662785103, now seen corresponding path program 37 times [2020-10-28 15:03:39,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:39,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860258579] [2020-10-28 15:03:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:39,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:40,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:40,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:40,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 15:03:40,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:40,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-10-28 15:03:40,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:40,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:40,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 15:03:40,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:03:40,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 15:03:40,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:42,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:42,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:42,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:42,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:42,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:42,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:42,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:42,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:42,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:42,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860258579] [2020-10-28 15:03:42,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:42,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 15:03:42,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561558566] [2020-10-28 15:03:42,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 15:03:42,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:42,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 15:03:42,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:03:42,112 INFO L87 Difference]: Start difference. First operand 202 states and 239 transitions. Second operand 43 states. [2020-10-28 15:03:45,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:45,266 INFO L93 Difference]: Finished difference Result 222 states and 261 transitions. [2020-10-28 15:03:45,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 15:03:45,267 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 93 [2020-10-28 15:03:45,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:45,269 INFO L225 Difference]: With dead ends: 222 [2020-10-28 15:03:45,269 INFO L226 Difference]: Without dead ends: 214 [2020-10-28 15:03:45,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2354, Invalid=4452, Unknown=0, NotChecked=0, Total=6806 [2020-10-28 15:03:45,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-28 15:03:45,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 207. [2020-10-28 15:03:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-28 15:03:45,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 245 transitions. [2020-10-28 15:03:45,276 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 245 transitions. Word has length 93 [2020-10-28 15:03:45,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:45,276 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 245 transitions. [2020-10-28 15:03:45,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 15:03:45,277 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 245 transitions. [2020-10-28 15:03:45,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 15:03:45,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:45,278 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:45,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 15:03:45,278 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:45,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:45,278 INFO L82 PathProgramCache]: Analyzing trace with hash -719575798, now seen corresponding path program 38 times [2020-10-28 15:03:45,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:45,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405794799] [2020-10-28 15:03:45,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:45,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:45,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:46,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:46,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 15:03:46,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:46,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1463 [2020-10-28 15:03:46,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:46,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:46,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 15:03:46,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:03:46,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 15:03:46,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:47,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:47,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:47,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:47,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:47,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:47,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:47,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:47,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:47,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:47,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:47,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:47,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:47,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405794799] [2020-10-28 15:03:47,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:47,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-28 15:03:47,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002116760] [2020-10-28 15:03:47,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-28 15:03:47,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:47,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-28 15:03:47,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 15:03:47,983 INFO L87 Difference]: Start difference. First operand 207 states and 245 transitions. Second operand 44 states. [2020-10-28 15:03:51,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:51,309 INFO L93 Difference]: Finished difference Result 227 states and 267 transitions. [2020-10-28 15:03:51,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 15:03:51,310 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 95 [2020-10-28 15:03:51,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:51,312 INFO L225 Difference]: With dead ends: 227 [2020-10-28 15:03:51,313 INFO L226 Difference]: Without dead ends: 219 [2020-10-28 15:03:51,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2474, Invalid=4666, Unknown=0, NotChecked=0, Total=7140 [2020-10-28 15:03:51,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-28 15:03:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 212. [2020-10-28 15:03:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-28 15:03:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 251 transitions. [2020-10-28 15:03:51,319 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 251 transitions. Word has length 95 [2020-10-28 15:03:51,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:51,320 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 251 transitions. [2020-10-28 15:03:51,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-28 15:03:51,320 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 251 transitions. [2020-10-28 15:03:51,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 15:03:51,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:51,321 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:51,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 15:03:51,321 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:51,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:51,322 INFO L82 PathProgramCache]: Analyzing trace with hash -950832891, now seen corresponding path program 39 times [2020-10-28 15:03:51,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:51,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611265845] [2020-10-28 15:03:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:51,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:51,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:52,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:52,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 15:03:52,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:52,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1282 [2020-10-28 15:03:52,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:52,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:52,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 15:03:52,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:03:52,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 15:03:52,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:53,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:53,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:53,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:53,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:53,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:53,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:03:53,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:53,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:53,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:53,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:53,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:53,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:53,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611265845] [2020-10-28 15:03:53,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:53,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-28 15:03:53,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648763022] [2020-10-28 15:03:53,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-28 15:03:53,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:53,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-28 15:03:53,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:03:53,968 INFO L87 Difference]: Start difference. First operand 212 states and 251 transitions. Second operand 45 states. [2020-10-28 15:03:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:57,416 INFO L93 Difference]: Finished difference Result 232 states and 273 transitions. [2020-10-28 15:03:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 15:03:57,416 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 97 [2020-10-28 15:03:57,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:57,418 INFO L225 Difference]: With dead ends: 232 [2020-10-28 15:03:57,418 INFO L226 Difference]: Without dead ends: 224 [2020-10-28 15:03:57,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2597, Invalid=4885, Unknown=0, NotChecked=0, Total=7482 [2020-10-28 15:03:57,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-28 15:03:57,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 217. [2020-10-28 15:03:57,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-28 15:03:57,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 257 transitions. [2020-10-28 15:03:57,425 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 257 transitions. Word has length 97 [2020-10-28 15:03:57,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:57,425 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 257 transitions. [2020-10-28 15:03:57,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-28 15:03:57,425 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 257 transitions. [2020-10-28 15:03:57,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 15:03:57,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:57,426 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:57,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 15:03:57,427 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:57,427 INFO L82 PathProgramCache]: Analyzing trace with hash 149400128, now seen corresponding path program 40 times [2020-10-28 15:03:57,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:57,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900304089] [2020-10-28 15:03:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:57,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:57,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:59,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:59,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 15:03:59,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:59,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2063 [2020-10-28 15:03:59,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:59,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:59,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 15:03:59,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:03:59,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 15:03:59,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:00,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:00,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:00,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:00,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:00,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:00,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:00,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:00,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:00,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:00,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:00,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:00,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:00,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900304089] [2020-10-28 15:04:00,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:00,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 15:04:00,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586311852] [2020-10-28 15:04:00,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 15:04:00,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:00,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 15:04:00,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 15:04:00,953 INFO L87 Difference]: Start difference. First operand 217 states and 257 transitions. Second operand 46 states. [2020-10-28 15:04:04,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:04,674 INFO L93 Difference]: Finished difference Result 237 states and 279 transitions. [2020-10-28 15:04:04,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 15:04:04,675 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 99 [2020-10-28 15:04:04,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:04,676 INFO L225 Difference]: With dead ends: 237 [2020-10-28 15:04:04,677 INFO L226 Difference]: Without dead ends: 229 [2020-10-28 15:04:04,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2723, Invalid=5109, Unknown=0, NotChecked=0, Total=7832 [2020-10-28 15:04:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-28 15:04:04,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 222. [2020-10-28 15:04:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-28 15:04:04,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 263 transitions. [2020-10-28 15:04:04,683 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 263 transitions. Word has length 99 [2020-10-28 15:04:04,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:04,683 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 263 transitions. [2020-10-28 15:04:04,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 15:04:04,683 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 263 transitions. [2020-10-28 15:04:04,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 15:04:04,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:04,684 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:04,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 15:04:04,685 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:04,685 INFO L82 PathProgramCache]: Analyzing trace with hash 911376571, now seen corresponding path program 41 times [2020-10-28 15:04:04,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:04,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001652256] [2020-10-28 15:04:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:04,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:05,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:07,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:07,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 15:04:07,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:07,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3061 [2020-10-28 15:04:07,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:07,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:07,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-28 15:04:07,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:07,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-28 15:04:07,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:09,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:09,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:09,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:09,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:09,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:09,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:09,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:09,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:09,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:09,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:09,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:09,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:09,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001652256] [2020-10-28 15:04:09,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:09,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-28 15:04:09,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445937998] [2020-10-28 15:04:09,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-28 15:04:09,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:09,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-28 15:04:09,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 15:04:09,303 INFO L87 Difference]: Start difference. First operand 222 states and 263 transitions. Second operand 47 states. [2020-10-28 15:04:13,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:13,188 INFO L93 Difference]: Finished difference Result 242 states and 285 transitions. [2020-10-28 15:04:13,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 15:04:13,189 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 101 [2020-10-28 15:04:13,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:13,191 INFO L225 Difference]: With dead ends: 242 [2020-10-28 15:04:13,192 INFO L226 Difference]: Without dead ends: 234 [2020-10-28 15:04:13,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2852, Invalid=5338, Unknown=0, NotChecked=0, Total=8190 [2020-10-28 15:04:13,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-28 15:04:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 227. [2020-10-28 15:04:13,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-28 15:04:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 269 transitions. [2020-10-28 15:04:13,200 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 269 transitions. Word has length 101 [2020-10-28 15:04:13,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:13,201 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 269 transitions. [2020-10-28 15:04:13,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-28 15:04:13,201 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 269 transitions. [2020-10-28 15:04:13,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 15:04:13,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:13,205 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:13,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 15:04:13,205 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:13,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:13,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1268669322, now seen corresponding path program 42 times [2020-10-28 15:04:13,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:13,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176158944] [2020-10-28 15:04:13,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:13,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:13,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:15,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:15,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 15:04:15,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:15,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2351 [2020-10-28 15:04:15,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:15,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 15:04:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 15:04:15,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:17,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:17,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:17,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:17,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:17,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:17,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:17,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:17,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:17,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:17,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:17,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:17,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:17,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176158944] [2020-10-28 15:04:17,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:17,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-28 15:04:17,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891020624] [2020-10-28 15:04:17,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-28 15:04:17,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:17,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-28 15:04:17,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 15:04:17,138 INFO L87 Difference]: Start difference. First operand 227 states and 269 transitions. Second operand 48 states. [2020-10-28 15:04:21,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:21,048 INFO L93 Difference]: Finished difference Result 247 states and 291 transitions. [2020-10-28 15:04:21,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-28 15:04:21,049 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 103 [2020-10-28 15:04:21,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:21,050 INFO L225 Difference]: With dead ends: 247 [2020-10-28 15:04:21,051 INFO L226 Difference]: Without dead ends: 239 [2020-10-28 15:04:21,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2984, Invalid=5572, Unknown=0, NotChecked=0, Total=8556 [2020-10-28 15:04:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-28 15:04:21,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 232. [2020-10-28 15:04:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-28 15:04:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 275 transitions. [2020-10-28 15:04:21,057 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 275 transitions. Word has length 103 [2020-10-28 15:04:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:21,057 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 275 transitions. [2020-10-28 15:04:21,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-28 15:04:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 275 transitions. [2020-10-28 15:04:21,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 15:04:21,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:21,059 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:21,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 15:04:21,059 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:21,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:21,059 INFO L82 PathProgramCache]: Analyzing trace with hash -348732047, now seen corresponding path program 43 times [2020-10-28 15:04:21,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:21,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29672335] [2020-10-28 15:04:21,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:21,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:21,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:23,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:23,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 15:04:23,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:23,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2591 [2020-10-28 15:04:23,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:23,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:23,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-28 15:04:23,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:23,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 15:04:23,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:25,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:25,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:25,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:25,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:25,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:25,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:04:25,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:25,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:25,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:25,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:25,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:25,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:25,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29672335] [2020-10-28 15:04:25,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:25,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-28 15:04:25,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575007559] [2020-10-28 15:04:25,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-28 15:04:25,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:25,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-28 15:04:25,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1041, Invalid=1311, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 15:04:25,327 INFO L87 Difference]: Start difference. First operand 232 states and 275 transitions. Second operand 49 states. [2020-10-28 15:04:29,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:29,427 INFO L93 Difference]: Finished difference Result 252 states and 297 transitions. [2020-10-28 15:04:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 15:04:29,427 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 105 [2020-10-28 15:04:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:29,429 INFO L225 Difference]: With dead ends: 252 [2020-10-28 15:04:29,429 INFO L226 Difference]: Without dead ends: 244 [2020-10-28 15:04:29,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3119, Invalid=5811, Unknown=0, NotChecked=0, Total=8930 [2020-10-28 15:04:29,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-28 15:04:29,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 237. [2020-10-28 15:04:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-28 15:04:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 281 transitions. [2020-10-28 15:04:29,439 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 281 transitions. Word has length 105 [2020-10-28 15:04:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:29,439 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 281 transitions. [2020-10-28 15:04:29,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-28 15:04:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 281 transitions. [2020-10-28 15:04:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 15:04:29,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:29,440 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:29,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 15:04:29,441 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:29,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1052273748, now seen corresponding path program 44 times [2020-10-28 15:04:29,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:29,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813317402] [2020-10-28 15:04:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:29,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:30,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:31,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:31,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 15:04:31,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:31,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2521 [2020-10-28 15:04:31,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:31,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:31,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-28 15:04:31,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:31,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-28 15:04:31,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:33,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:33,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:33,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:33,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:33,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:33,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:33,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:33,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:33,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:33,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:33,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:33,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:33,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813317402] [2020-10-28 15:04:33,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:33,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-28 15:04:33,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277109515] [2020-10-28 15:04:33,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-28 15:04:33,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:33,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-28 15:04:33,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1363, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 15:04:33,702 INFO L87 Difference]: Start difference. First operand 237 states and 281 transitions. Second operand 50 states. [2020-10-28 15:04:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:37,977 INFO L93 Difference]: Finished difference Result 257 states and 303 transitions. [2020-10-28 15:04:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-28 15:04:37,978 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2020-10-28 15:04:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:37,981 INFO L225 Difference]: With dead ends: 257 [2020-10-28 15:04:37,981 INFO L226 Difference]: Without dead ends: 249 [2020-10-28 15:04:37,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3257, Invalid=6055, Unknown=0, NotChecked=0, Total=9312 [2020-10-28 15:04:37,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-28 15:04:37,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 242. [2020-10-28 15:04:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-28 15:04:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 287 transitions. [2020-10-28 15:04:37,987 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 287 transitions. Word has length 107 [2020-10-28 15:04:37,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:37,988 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 287 transitions. [2020-10-28 15:04:37,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-28 15:04:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 287 transitions. [2020-10-28 15:04:37,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 15:04:37,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:37,989 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:37,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 15:04:37,989 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:37,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:37,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1448984359, now seen corresponding path program 45 times [2020-10-28 15:04:37,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:37,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175157106] [2020-10-28 15:04:37,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:38,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:38,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:40,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:40,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 15:04:40,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:40,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2577 [2020-10-28 15:04:40,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:40,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:40,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-28 15:04:40,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:40,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 15:04:40,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:42,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:42,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:42,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:42,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:42,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:42,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:04:42,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:42,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:42,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:42,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:42,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:42,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:42,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175157106] [2020-10-28 15:04:42,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:42,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-28 15:04:42,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405219935] [2020-10-28 15:04:42,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-28 15:04:42,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:42,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-28 15:04:42,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 15:04:42,395 INFO L87 Difference]: Start difference. First operand 242 states and 287 transitions. Second operand 51 states. [2020-10-28 15:04:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:46,904 INFO L93 Difference]: Finished difference Result 262 states and 309 transitions. [2020-10-28 15:04:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-28 15:04:46,905 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 109 [2020-10-28 15:04:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:46,907 INFO L225 Difference]: With dead ends: 262 [2020-10-28 15:04:46,907 INFO L226 Difference]: Without dead ends: 254 [2020-10-28 15:04:46,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3398, Invalid=6304, Unknown=0, NotChecked=0, Total=9702 [2020-10-28 15:04:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-28 15:04:46,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 247. [2020-10-28 15:04:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-28 15:04:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 293 transitions. [2020-10-28 15:04:46,914 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 293 transitions. Word has length 109 [2020-10-28 15:04:46,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:46,914 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 293 transitions. [2020-10-28 15:04:46,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-28 15:04:46,914 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 293 transitions. [2020-10-28 15:04:46,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 15:04:46,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:46,916 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:46,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 15:04:46,916 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:46,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:46,916 INFO L82 PathProgramCache]: Analyzing trace with hash -23660574, now seen corresponding path program 46 times [2020-10-28 15:04:46,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:46,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663486589] [2020-10-28 15:04:46,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:46,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:47,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:50,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:50,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 15:04:50,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:50,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3178 [2020-10-28 15:04:50,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:50,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:50,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-28 15:04:50,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:50,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 15:04:50,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:52,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:52,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:52,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:52,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:52,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:52,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:52,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:52,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:52,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:52,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:52,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:52,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:52,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663486589] [2020-10-28 15:04:52,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:52,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-28 15:04:52,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822566870] [2020-10-28 15:04:52,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-28 15:04:52,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:52,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-28 15:04:52,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=1470, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 15:04:52,049 INFO L87 Difference]: Start difference. First operand 247 states and 293 transitions. Second operand 52 states. [2020-10-28 15:04:56,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:56,831 INFO L93 Difference]: Finished difference Result 267 states and 315 transitions. [2020-10-28 15:04:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-28 15:04:56,831 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 111 [2020-10-28 15:04:56,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:56,834 INFO L225 Difference]: With dead ends: 267 [2020-10-28 15:04:56,834 INFO L226 Difference]: Without dead ends: 259 [2020-10-28 15:04:56,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3542, Invalid=6558, Unknown=0, NotChecked=0, Total=10100 [2020-10-28 15:04:56,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-28 15:04:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 252. [2020-10-28 15:04:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-28 15:04:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 299 transitions. [2020-10-28 15:04:56,841 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 299 transitions. Word has length 111 [2020-10-28 15:04:56,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:56,842 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 299 transitions. [2020-10-28 15:04:56,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-28 15:04:56,842 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 299 transitions. [2020-10-28 15:04:56,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 15:04:56,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:56,843 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:56,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 15:04:56,843 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:56,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:56,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2103766493, now seen corresponding path program 47 times [2020-10-28 15:04:56,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:56,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632503648] [2020-10-28 15:04:56,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:56,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:57,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:00,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:00,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 15:05:00,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:00,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3309 [2020-10-28 15:05:00,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:00,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:00,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-28 15:05:00,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:00,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 15:05:00,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:02,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:02,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:02,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:02,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:02,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:05:02,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:02,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:02,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:02,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:02,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:02,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:02,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632503648] [2020-10-28 15:05:02,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:02,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-28 15:05:02,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377019931] [2020-10-28 15:05:02,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-28 15:05:02,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:02,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-28 15:05:02,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=1525, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 15:05:02,234 INFO L87 Difference]: Start difference. First operand 252 states and 299 transitions. Second operand 53 states. [2020-10-28 15:05:07,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:07,299 INFO L93 Difference]: Finished difference Result 272 states and 321 transitions. [2020-10-28 15:05:07,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-28 15:05:07,299 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 113 [2020-10-28 15:05:07,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:07,302 INFO L225 Difference]: With dead ends: 272 [2020-10-28 15:05:07,302 INFO L226 Difference]: Without dead ends: 264 [2020-10-28 15:05:07,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3689, Invalid=6817, Unknown=0, NotChecked=0, Total=10506 [2020-10-28 15:05:07,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-28 15:05:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 257. [2020-10-28 15:05:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-28 15:05:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 305 transitions. [2020-10-28 15:05:07,310 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 305 transitions. Word has length 113 [2020-10-28 15:05:07,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:07,310 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 305 transitions. [2020-10-28 15:05:07,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-28 15:05:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 305 transitions. [2020-10-28 15:05:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 15:05:07,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:07,312 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:07,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 15:05:07,320 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:07,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:07,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2138222312, now seen corresponding path program 48 times [2020-10-28 15:05:07,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:07,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56411767] [2020-10-28 15:05:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:07,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:08,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:10,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:10,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 15:05:10,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:10,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3369 [2020-10-28 15:05:10,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:10,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:10,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-28 15:05:10,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:10,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 15:05:10,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:12,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:12,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:12,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:12,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:12,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:12,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:12,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:12,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:12,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:12,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:12,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:12,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:12,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56411767] [2020-10-28 15:05:12,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:12,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-28 15:05:12,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133400489] [2020-10-28 15:05:12,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-28 15:05:12,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:12,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-28 15:05:12,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1281, Invalid=1581, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 15:05:12,855 INFO L87 Difference]: Start difference. First operand 257 states and 305 transitions. Second operand 54 states. [2020-10-28 15:05:18,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:18,067 INFO L93 Difference]: Finished difference Result 277 states and 327 transitions. [2020-10-28 15:05:18,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-28 15:05:18,068 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 115 [2020-10-28 15:05:18,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:18,070 INFO L225 Difference]: With dead ends: 277 [2020-10-28 15:05:18,070 INFO L226 Difference]: Without dead ends: 269 [2020-10-28 15:05:18,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3839, Invalid=7081, Unknown=0, NotChecked=0, Total=10920 [2020-10-28 15:05:18,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-28 15:05:18,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 262. [2020-10-28 15:05:18,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-28 15:05:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 311 transitions. [2020-10-28 15:05:18,076 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 311 transitions. Word has length 115 [2020-10-28 15:05:18,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:18,076 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 311 transitions. [2020-10-28 15:05:18,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-28 15:05:18,076 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 311 transitions. [2020-10-28 15:05:18,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 15:05:18,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:18,077 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:18,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 15:05:18,077 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:18,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:18,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1529467283, now seen corresponding path program 49 times [2020-10-28 15:05:18,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:18,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685662355] [2020-10-28 15:05:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:18,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:18,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:22,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:22,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 15:05:22,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:22,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3980 [2020-10-28 15:05:22,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:22,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-28 15:05:22,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:22,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 15:05:22,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:24,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:24,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:24,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:24,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:24,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:24,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:24,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:24,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:24,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:24,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:24,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:24,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685662355] [2020-10-28 15:05:24,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:24,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-28 15:05:24,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052566180] [2020-10-28 15:05:24,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-28 15:05:24,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:24,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-28 15:05:24,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=1638, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 15:05:24,292 INFO L87 Difference]: Start difference. First operand 262 states and 311 transitions. Second operand 55 states. [2020-10-28 15:05:29,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:29,614 INFO L93 Difference]: Finished difference Result 282 states and 333 transitions. [2020-10-28 15:05:29,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-28 15:05:29,615 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 117 [2020-10-28 15:05:29,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:29,618 INFO L225 Difference]: With dead ends: 282 [2020-10-28 15:05:29,618 INFO L226 Difference]: Without dead ends: 274 [2020-10-28 15:05:29,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=3992, Invalid=7350, Unknown=0, NotChecked=0, Total=11342 [2020-10-28 15:05:29,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-28 15:05:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 267. [2020-10-28 15:05:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-28 15:05:29,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 317 transitions. [2020-10-28 15:05:29,625 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 317 transitions. Word has length 117 [2020-10-28 15:05:29,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:29,625 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 317 transitions. [2020-10-28 15:05:29,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-28 15:05:29,625 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 317 transitions. [2020-10-28 15:05:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 15:05:29,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:29,626 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:29,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 15:05:29,627 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:29,627 INFO L82 PathProgramCache]: Analyzing trace with hash 11018062, now seen corresponding path program 50 times [2020-10-28 15:05:29,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:29,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695693221] [2020-10-28 15:05:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:29,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:30,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:32,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:32,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 15:05:32,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:32,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3104 [2020-10-28 15:05:32,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:32,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:32,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-28 15:05:32,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:32,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 15:05:32,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:35,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:35,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:35,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:35,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:35,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:35,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:35,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:35,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:35,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:35,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:35,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:35,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695693221] [2020-10-28 15:05:35,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:35,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-28 15:05:35,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383315555] [2020-10-28 15:05:35,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-28 15:05:35,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:35,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-28 15:05:35,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1384, Invalid=1696, Unknown=0, NotChecked=0, Total=3080 [2020-10-28 15:05:35,078 INFO L87 Difference]: Start difference. First operand 267 states and 317 transitions. Second operand 56 states. [2020-10-28 15:05:40,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:40,647 INFO L93 Difference]: Finished difference Result 287 states and 339 transitions. [2020-10-28 15:05:40,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-28 15:05:40,648 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 119 [2020-10-28 15:05:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:40,650 INFO L225 Difference]: With dead ends: 287 [2020-10-28 15:05:40,650 INFO L226 Difference]: Without dead ends: 279 [2020-10-28 15:05:40,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=4148, Invalid=7624, Unknown=0, NotChecked=0, Total=11772 [2020-10-28 15:05:40,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-28 15:05:40,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 272. [2020-10-28 15:05:40,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-28 15:05:40,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 323 transitions. [2020-10-28 15:05:40,657 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 323 transitions. Word has length 119 [2020-10-28 15:05:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:40,657 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 323 transitions. [2020-10-28 15:05:40,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-28 15:05:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 323 transitions. [2020-10-28 15:05:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 15:05:40,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:40,658 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:40,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 15:05:40,659 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:40,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1070197321, now seen corresponding path program 51 times [2020-10-28 15:05:40,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:40,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195573963] [2020-10-28 15:05:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:40,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:41,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:43,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 15:05:43,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:43,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3049 [2020-10-28 15:05:43,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:43,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:43,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-28 15:05:43,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:43,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 15:05:43,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0