/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/loops-crafted-1/in-de20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:05:45,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:05:45,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:05:45,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:05:45,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:05:45,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:05:45,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:05:45,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:05:45,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:05:45,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:05:45,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:05:45,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:05:45,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:05:45,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:05:45,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:05:45,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:05:45,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:05:45,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:05:45,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:05:45,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:05:45,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:05:45,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:05:45,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:05:45,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:05:45,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:05:45,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:05:45,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:05:45,182 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:05:45,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:05:45,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:05:45,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:05:45,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:05:45,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:05:45,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:05:45,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:05:45,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:05:45,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:05:45,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:05:45,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:05:45,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:05:45,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:05:45,199 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 15:05:45,246 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:05:45,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:05:45,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:05:45,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:05:45,250 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:05:45,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:05:45,251 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:05:45,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:05:45,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:05:45,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:05:45,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:05:45,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:05:45,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:05:45,253 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:05:45,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:05:45,253 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:05:45,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:05:45,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:05:45,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:05:45,254 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:05:45,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:05:45,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:05:45,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:05:45,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:05:45,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:05:45,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:05:45,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:05:45,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:05:45,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:05:45,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:05:45,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:05:45,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:05:45,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:05:45,704 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:05:45,708 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:05:45,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de20.c [2020-10-28 15:05:45,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b26e95296/177c44281d7c4d81bf46295a3f88f221/FLAGafb10ea00 [2020-10-28 15:05:46,498 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:05:46,499 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de20.c [2020-10-28 15:05:46,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b26e95296/177c44281d7c4d81bf46295a3f88f221/FLAGafb10ea00 [2020-10-28 15:05:46,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b26e95296/177c44281d7c4d81bf46295a3f88f221 [2020-10-28 15:05:46,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:05:46,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:05:46,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:05:46,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:05:46,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:05:46,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:05:46" (1/1) ... [2020-10-28 15:05:46,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bf018bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:46, skipping insertion in model container [2020-10-28 15:05:46,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:05:46" (1/1) ... [2020-10-28 15:05:46,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:05:46,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:05:47,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:05:47,122 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:05:47,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:05:47,154 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:05:47,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:47 WrapperNode [2020-10-28 15:05:47,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:05:47,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:05:47,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:05:47,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:05:47,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:47" (1/1) ... [2020-10-28 15:05:47,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:47" (1/1) ... [2020-10-28 15:05:47,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:47" (1/1) ... [2020-10-28 15:05:47,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:47" (1/1) ... [2020-10-28 15:05:47,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:47" (1/1) ... [2020-10-28 15:05:47,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:47" (1/1) ... [2020-10-28 15:05:47,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:47" (1/1) ... [2020-10-28 15:05:47,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:05:47,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:05:47,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:05:47,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:05:47,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:47" (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 15:05:47,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:05:47,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:05:47,277 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:05:47,278 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:05:47,278 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:05:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:05:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:05:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:05:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:05:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-28 15:05:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:05:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:05:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:05:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:05:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:05:47,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:05:47,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:05:47,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:05:47,524 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:05:47,524 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 15:05:47,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:05:47 BoogieIcfgContainer [2020-10-28 15:05:47,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:05:47,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:05:47,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:05:47,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:05:47,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:05:46" (1/3) ... [2020-10-28 15:05:47,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de70bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:05:47, skipping insertion in model container [2020-10-28 15:05:47,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:47" (2/3) ... [2020-10-28 15:05:47,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de70bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:05:47, skipping insertion in model container [2020-10-28 15:05:47,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:05:47" (3/3) ... [2020-10-28 15:05:47,537 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de20.c [2020-10-28 15:05:47,551 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:05:47,557 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:05:47,575 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:05:47,612 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:05:47,613 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:05:47,614 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:05:47,614 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:05:47,614 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:05:47,614 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:05:47,615 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:05:47,615 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:05:47,642 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-28 15:05:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 15:05:47,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:47,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:47,652 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:47,661 INFO L82 PathProgramCache]: Analyzing trace with hash -773811684, now seen corresponding path program 1 times [2020-10-28 15:05:47,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:47,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363777590] [2020-10-28 15:05:47,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:48,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:48,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:48,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 15:05:48,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:48,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-28 15:05:48,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:48,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:48,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:05:48,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:48,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:05:48,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:05:48,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:48,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:48,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:48,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:48,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:48,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 15:05:48,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:48,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:48,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:48,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:48,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:48,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:48,707 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 15:05:48,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363777590] [2020-10-28 15:05:48,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:05:48,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:05:48,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054729824] [2020-10-28 15:05:48,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:05:48,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:48,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:05:48,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:05:48,736 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-28 15:05:49,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:49,075 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2020-10-28 15:05:49,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:05:49,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-28 15:05:49,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:49,087 INFO L225 Difference]: With dead ends: 51 [2020-10-28 15:05:49,087 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 15:05:49,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:05:49,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 15:05:49,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-28 15:05:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 15:05:49,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-28 15:05:49,138 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2020-10-28 15:05:49,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:49,138 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-28 15:05:49,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:05:49,139 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-28 15:05:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 15:05:49,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:49,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:49,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:05:49,140 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:49,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:49,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1443989559, now seen corresponding path program 1 times [2020-10-28 15:05:49,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:49,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603740193] [2020-10-28 15:05:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:49,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:49,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:49,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:05:49,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:49,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-28 15:05:49,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:49,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:49,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:05:49,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:49,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:05:49,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:49,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:49,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:49,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:49,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:49,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:49,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 15:05:49,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:49,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:49,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:49,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:49,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:49,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:49,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603740193] [2020-10-28 15:05:49,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:05:49,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:05:49,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662116131] [2020-10-28 15:05:49,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:05:49,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:49,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:05:49,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:05:49,445 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-10-28 15:05:49,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:49,642 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-10-28 15:05:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:05:49,643 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-28 15:05:49,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:49,644 INFO L225 Difference]: With dead ends: 25 [2020-10-28 15:05:49,644 INFO L226 Difference]: Without dead ends: 16 [2020-10-28 15:05:49,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:05:49,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-28 15:05:49,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-28 15:05:49,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 15:05:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-28 15:05:49,655 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 15 [2020-10-28 15:05:49,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:49,655 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-28 15:05:49,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:05:49,655 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-28 15:05:49,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 15:05:49,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:49,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:49,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:05:49,657 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:49,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:49,658 INFO L82 PathProgramCache]: Analyzing trace with hash -2028457144, now seen corresponding path program 1 times [2020-10-28 15:05:49,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:49,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529644644] [2020-10-28 15:05:49,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:49,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:49,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:49,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:05:49,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:49,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 15:05:49,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:49,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:49,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:05:49,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:49,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:05:49,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:49,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:49,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:49,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:49,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:49,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:49,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:05:49,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:49,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:49,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:49,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:49,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:49,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:49,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529644644] [2020-10-28 15:05:49,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:49,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:05:49,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116330909] [2020-10-28 15:05:49,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:05:49,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:49,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:05:49,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:05:49,867 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-10-28 15:05:50,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:50,049 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-28 15:05:50,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:05:50,049 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-28 15:05:50,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:50,051 INFO L225 Difference]: With dead ends: 27 [2020-10-28 15:05:50,052 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 15:05:50,052 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 15:05:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 15:05:50,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-28 15:05:50,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 15:05:50,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-28 15:05:50,060 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-28 15:05:50,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:50,061 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-28 15:05:50,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:05:50,061 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-28 15:05:50,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 15:05:50,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:50,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:50,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:05:50,062 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:50,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:50,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1683293155, now seen corresponding path program 1 times [2020-10-28 15:05:50,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:50,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273775405] [2020-10-28 15:05:50,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:50,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:50,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:50,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 15:05:50,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:50,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-28 15:05:50,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:50,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:50,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:05:50,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:50,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:05:50,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:50,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:50,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:50,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:50,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:50,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:50,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:05:50,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:50,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:50,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:50,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:50,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:50,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:50,443 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 15:05:50,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273775405] [2020-10-28 15:05:50,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:50,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:05:50,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211196506] [2020-10-28 15:05:50,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:05:50,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:50,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:05:50,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:05:50,446 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 8 states. [2020-10-28 15:05:50,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:50,679 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-28 15:05:50,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:05:50,680 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-28 15:05:50,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:50,680 INFO L225 Difference]: With dead ends: 26 [2020-10-28 15:05:50,681 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 15:05:50,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:05:50,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 15:05:50,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-28 15:05:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 15:05:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-28 15:05:50,689 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2020-10-28 15:05:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:50,689 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-28 15:05:50,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:05:50,689 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-28 15:05:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 15:05:50,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:50,690 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:50,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:05:50,691 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:50,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:50,691 INFO L82 PathProgramCache]: Analyzing trace with hash 2027206556, now seen corresponding path program 2 times [2020-10-28 15:05:50,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:50,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138572824] [2020-10-28 15:05:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:50,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:50,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:50,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 15:05:50,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:50,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-28 15:05:50,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:50,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:50,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:05:50,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:50,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:05:50,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:50,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:50,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:50,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:50,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:50,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:50,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:05:50,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:50,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:50,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:50,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:50,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:50,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:50,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138572824] [2020-10-28 15:05:50,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:50,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:05:50,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292647975] [2020-10-28 15:05:50,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:05:50,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:50,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:05:50,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:05:50,942 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2020-10-28 15:05:51,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:51,253 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-28 15:05:51,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:05:51,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-28 15:05:51,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:51,254 INFO L225 Difference]: With dead ends: 33 [2020-10-28 15:05:51,254 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:05:51,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:05:51,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:05:51,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-10-28 15:05:51,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 15:05:51,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-28 15:05:51,263 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2020-10-28 15:05:51,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:51,263 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-28 15:05:51,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:05:51,264 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-28 15:05:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:05:51,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:51,264 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:51,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:05:51,265 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:51,266 INFO L82 PathProgramCache]: Analyzing trace with hash 426855912, now seen corresponding path program 2 times [2020-10-28 15:05:51,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:51,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760545851] [2020-10-28 15:05:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:51,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:51,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:51,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:05:51,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:51,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-28 15:05:51,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:51,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:51,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:05:51,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:51,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:05:51,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:51,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:51,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:51,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:51,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:51,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:51,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:05:51,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:51,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:51,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:51,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:51,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:51,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:51,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760545851] [2020-10-28 15:05:51,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:51,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:05:51,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544613814] [2020-10-28 15:05:51,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:05:51,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:51,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:05:51,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:05:51,486 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2020-10-28 15:05:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:51,764 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-28 15:05:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:05:51,765 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-28 15:05:51,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:51,766 INFO L225 Difference]: With dead ends: 30 [2020-10-28 15:05:51,766 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 15:05:51,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:05:51,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 15:05:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-28 15:05:51,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 15:05:51,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-28 15:05:51,774 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-10-28 15:05:51,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:51,774 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-28 15:05:51,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:05:51,775 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-28 15:05:51,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:05:51,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:51,775 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:51,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:05:51,776 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:51,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:51,776 INFO L82 PathProgramCache]: Analyzing trace with hash -511770039, now seen corresponding path program 3 times [2020-10-28 15:05:51,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:51,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209090319] [2020-10-28 15:05:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:51,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:51,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:51,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:05:51,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:51,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-28 15:05:51,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:51,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:51,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:05:51,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:51,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:05:51,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:52,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:52,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:52,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:52,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:52,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 15:05:52,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:52,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:52,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:52,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:52,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:52,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:52,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209090319] [2020-10-28 15:05:52,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:52,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:05:52,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047953794] [2020-10-28 15:05:52,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:05:52,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:52,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:05:52,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:05:52,061 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2020-10-28 15:05:52,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:52,404 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-28 15:05:52,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:05:52,404 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-28 15:05:52,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:52,406 INFO L225 Difference]: With dead ends: 29 [2020-10-28 15:05:52,406 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 15:05:52,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:05:52,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 15:05:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-10-28 15:05:52,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 15:05:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-28 15:05:52,415 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2020-10-28 15:05:52,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:52,415 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-28 15:05:52,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:05:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-28 15:05:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:05:52,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:52,416 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:52,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:05:52,416 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1096237624, now seen corresponding path program 3 times [2020-10-28 15:05:52,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:52,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555317996] [2020-10-28 15:05:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:52,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:52,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:05:52,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:52,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-28 15:05:52,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:52,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:52,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:05:52,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:52,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:05:52,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:52,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:52,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:52,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:52,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:52,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:05:52,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:52,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:52,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:52,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:52,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:52,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:52,695 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 15:05:52,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555317996] [2020-10-28 15:05:52,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:52,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:05:52,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508114653] [2020-10-28 15:05:52,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:05:52,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:52,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:05:52,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:05:52,698 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2020-10-28 15:05:53,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:53,044 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-28 15:05:53,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:05:53,045 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-28 15:05:53,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:53,046 INFO L225 Difference]: With dead ends: 34 [2020-10-28 15:05:53,046 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 15:05:53,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:05:53,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 15:05:53,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-10-28 15:05:53,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 15:05:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-28 15:05:53,056 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-10-28 15:05:53,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:53,056 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-28 15:05:53,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:05:53,057 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-28 15:05:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:05:53,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:53,058 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:53,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:05:53,058 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:53,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:53,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1910633156, now seen corresponding path program 4 times [2020-10-28 15:05:53,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:53,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678610211] [2020-10-28 15:05:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:53,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:53,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:53,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:05:53,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:53,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-28 15:05:53,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:53,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:53,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:05:53,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:53,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:05:53,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:53,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:53,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:53,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:53,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:53,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:53,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:53,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 15:05:53,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:53,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:53,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:53,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:53,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:53,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:53,569 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 15:05:53,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678610211] [2020-10-28 15:05:53,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:53,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:05:53,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445128407] [2020-10-28 15:05:53,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:05:53,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:53,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:05:53,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:05:53,576 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 9 states. [2020-10-28 15:05:53,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:53,921 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-10-28 15:05:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:05:53,921 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-28 15:05:53,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:53,923 INFO L225 Difference]: With dead ends: 31 [2020-10-28 15:05:53,923 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 15:05:53,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:05:53,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 15:05:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-28 15:05:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 15:05:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-28 15:05:53,937 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2020-10-28 15:05:53,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:53,937 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-28 15:05:53,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:05:53,937 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-28 15:05:53,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:05:53,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:53,938 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:53,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:05:53,938 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:53,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1445708189, now seen corresponding path program 5 times [2020-10-28 15:05:53,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:53,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899408485] [2020-10-28 15:05:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:53,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:54,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:54,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:05:54,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:54,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-28 15:05:54,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:54,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:54,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:05:54,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:54,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:05:54,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:54,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:54,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:54,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:54,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:54,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:54,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:05:54,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:54,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:54,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:54,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:54,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:54,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:54,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899408485] [2020-10-28 15:05:54,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:54,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:05:54,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555274820] [2020-10-28 15:05:54,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:05:54,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:54,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:05:54,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:05:54,226 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 9 states. [2020-10-28 15:05:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:54,685 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-10-28 15:05:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:05:54,685 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-28 15:05:54,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:54,687 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:05:54,687 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 15:05:54,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:05:54,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 15:05:54,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2020-10-28 15:05:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 15:05:54,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-28 15:05:54,698 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2020-10-28 15:05:54,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:54,698 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-28 15:05:54,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:05:54,698 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-28 15:05:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:05:54,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:54,699 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:54,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:05:54,700 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:54,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:54,700 INFO L82 PathProgramCache]: Analyzing trace with hash 861240604, now seen corresponding path program 4 times [2020-10-28 15:05:54,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:54,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840273856] [2020-10-28 15:05:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:54,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:54,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:54,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:05:54,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:54,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-28 15:05:54,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:54,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:54,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:05:54,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:54,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:05:54,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:54,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:54,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:54,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:54,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:54,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:54,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:05:54,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:54,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:54,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:54,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:54,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:54,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:54,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840273856] [2020-10-28 15:05:54,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:54,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:05:55,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306441643] [2020-10-28 15:05:55,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:05:55,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:55,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:05:55,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:05:55,002 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 9 states. [2020-10-28 15:05:55,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:55,387 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-10-28 15:05:55,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:05:55,388 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-28 15:05:55,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:55,389 INFO L225 Difference]: With dead ends: 41 [2020-10-28 15:05:55,389 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 15:05:55,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:05:55,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 15:05:55,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2020-10-28 15:05:55,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 15:05:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-28 15:05:55,398 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 18 [2020-10-28 15:05:55,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:55,398 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-28 15:05:55,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:05:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-28 15:05:55,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:05:55,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:55,399 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:55,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:05:55,400 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:55,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:55,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1969250473, now seen corresponding path program 6 times [2020-10-28 15:05:55,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:55,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134309543] [2020-10-28 15:05:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:55,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:55,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:55,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:05:55,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:55,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-28 15:05:55,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:55,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:55,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:05:55,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:55,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:05:55,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:55,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:55,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:55,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:55,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:55,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:55,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:05:55,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:55,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:55,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:55,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:55,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:55,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:55,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134309543] [2020-10-28 15:05:55,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:55,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:05:55,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678034107] [2020-10-28 15:05:55,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:05:55,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:55,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:05:55,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:05:55,763 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 9 states. [2020-10-28 15:05:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:56,117 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-10-28 15:05:56,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:05:56,118 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-28 15:05:56,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:56,119 INFO L225 Difference]: With dead ends: 35 [2020-10-28 15:05:56,120 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 15:05:56,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:05:56,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 15:05:56,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 15:05:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 15:05:56,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-28 15:05:56,134 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2020-10-28 15:05:56,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:56,134 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-28 15:05:56,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:05:56,134 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-28 15:05:56,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:05:56,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:56,136 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:56,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:05:56,137 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:56,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:56,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1358350232, now seen corresponding path program 7 times [2020-10-28 15:05:56,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:56,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979568558] [2020-10-28 15:05:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:56,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:56,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:56,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:05:56,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:56,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-28 15:05:56,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:56,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:56,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:05:56,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:56,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:05:56,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:56,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:56,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:56,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:56,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:56,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:56,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:05:56,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:56,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:56,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:56,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:56,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:56,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:56,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979568558] [2020-10-28 15:05:56,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:56,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:05:56,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145296490] [2020-10-28 15:05:56,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:05:56,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:56,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:05:56,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:05:56,522 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 10 states. [2020-10-28 15:05:56,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:56,953 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-28 15:05:56,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:05:56,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-28 15:05:56,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:56,955 INFO L225 Difference]: With dead ends: 34 [2020-10-28 15:05:56,955 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 15:05:56,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:05:56,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 15:05:56,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-28 15:05:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 15:05:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-28 15:05:56,968 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-10-28 15:05:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:56,968 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-28 15:05:56,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:05:56,968 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-28 15:05:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:05:56,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:56,971 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:56,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:05:56,971 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:56,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:56,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1997991113, now seen corresponding path program 8 times [2020-10-28 15:05:56,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:56,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794851012] [2020-10-28 15:05:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:57,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:57,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:57,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:05:57,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:57,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-28 15:05:57,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:57,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:57,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:05:57,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:57,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:05:57,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:57,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:57,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:57,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:57,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:57,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:57,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:05:57,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:57,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:57,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:57,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:57,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:57,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:57,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794851012] [2020-10-28 15:05:57,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:57,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:05:57,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331937854] [2020-10-28 15:05:57,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:05:57,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:57,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:05:57,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:05:57,361 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 10 states. [2020-10-28 15:05:57,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:57,874 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-28 15:05:57,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:05:57,875 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-28 15:05:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:57,876 INFO L225 Difference]: With dead ends: 37 [2020-10-28 15:05:57,876 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 15:05:57,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:05:57,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 15:05:57,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-10-28 15:05:57,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 15:05:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-28 15:05:57,891 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-10-28 15:05:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:57,891 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-28 15:05:57,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:05:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-28 15:05:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:05:57,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:57,893 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:57,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:05:57,894 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:57,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:57,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1413523528, now seen corresponding path program 5 times [2020-10-28 15:05:57,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:57,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174632633] [2020-10-28 15:05:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:57,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:58,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:58,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:05:58,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:58,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-28 15:05:58,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:58,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:58,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:05:58,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:58,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:05:58,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:58,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:58,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:58,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:58,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:58,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:58,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:05:58,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:58,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:58,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:58,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174632633] [2020-10-28 15:05:58,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:58,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:05:58,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592369116] [2020-10-28 15:05:58,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:05:58,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:58,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:05:58,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:05:58,211 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 10 states. [2020-10-28 15:05:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:58,678 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-28 15:05:58,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:05:58,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-28 15:05:58,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:58,679 INFO L225 Difference]: With dead ends: 42 [2020-10-28 15:05:58,679 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 15:05:58,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:05:58,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 15:05:58,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2020-10-28 15:05:58,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 15:05:58,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-28 15:05:58,691 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-10-28 15:05:58,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:58,692 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-28 15:05:58,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:05:58,692 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-28 15:05:58,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:05:58,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:58,693 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:58,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:05:58,693 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:58,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:58,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1910151933, now seen corresponding path program 9 times [2020-10-28 15:05:58,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:58,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827835264] [2020-10-28 15:05:58,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:58,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:58,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:58,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:05:58,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:58,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-28 15:05:58,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:58,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:58,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:05:58,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:58,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:05:58,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:59,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:59,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:59,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:59,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:59,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:59,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:05:59,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:59,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:59,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:59,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:59,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:59,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:59,337 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 15:05:59,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827835264] [2020-10-28 15:05:59,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:59,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:05:59,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54969730] [2020-10-28 15:05:59,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:05:59,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:59,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:05:59,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:05:59,340 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 11 states. [2020-10-28 15:05:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:59,858 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-28 15:05:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:05:59,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-28 15:05:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:59,859 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:05:59,859 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 15:05:59,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:05:59,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 15:05:59,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-28 15:05:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 15:05:59,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-28 15:05:59,871 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-10-28 15:05:59,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:59,871 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-28 15:05:59,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:05:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-28 15:05:59,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:05:59,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:59,872 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:59,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:05:59,872 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:59,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:59,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1417448772, now seen corresponding path program 10 times [2020-10-28 15:05:59,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:59,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761054370] [2020-10-28 15:05:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:59,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:00,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:06:00,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:00,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-28 15:06:00,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:00,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:06:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:06:00,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:00,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:00,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:00,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:00,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:00,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:00,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:00,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:00,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:00,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:00,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:00,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:00,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761054370] [2020-10-28 15:06:00,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:00,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:06:00,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541479709] [2020-10-28 15:06:00,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:06:00,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:00,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:06:00,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:06:00,329 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 11 states. [2020-10-28 15:06:00,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:00,948 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-10-28 15:06:00,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:06:00,949 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-28 15:06:00,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:00,949 INFO L225 Difference]: With dead ends: 42 [2020-10-28 15:06:00,949 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 15:06:00,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:06:00,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 15:06:00,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-10-28 15:06:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 15:06:00,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-28 15:06:00,972 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-10-28 15:06:00,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:00,973 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-28 15:06:00,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:06:00,973 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-28 15:06:00,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:06:00,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:00,977 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:00,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:06:00,978 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:00,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:00,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1938892573, now seen corresponding path program 11 times [2020-10-28 15:06:00,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:00,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943303192] [2020-10-28 15:06:00,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:01,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:01,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:01,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:06:01,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:01,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-28 15:06:01,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:01,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:01,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:06:01,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:01,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:06:01,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:01,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:01,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:01,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:01,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:01,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:01,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:06:01,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:01,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:01,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:01,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:01,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:01,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:06:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:01,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943303192] [2020-10-28 15:06:01,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:01,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:06:01,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610328630] [2020-10-28 15:06:01,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:06:01,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:01,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:06:01,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:06:01,463 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 11 states. [2020-10-28 15:06:02,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:02,036 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-28 15:06:02,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:06:02,036 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-28 15:06:02,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:02,037 INFO L225 Difference]: With dead ends: 45 [2020-10-28 15:06:02,037 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 15:06:02,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:06:02,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 15:06:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2020-10-28 15:06:02,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 15:06:02,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-28 15:06:02,052 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-10-28 15:06:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:02,053 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-28 15:06:02,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:06:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-28 15:06:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:06:02,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:02,054 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:02,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:06:02,055 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:02,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:02,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1354424988, now seen corresponding path program 6 times [2020-10-28 15:06:02,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:02,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073304752] [2020-10-28 15:06:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:02,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:02,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:02,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:06:02,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:02,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-28 15:06:02,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:02,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:02,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:06:02,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:02,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:06:02,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:02,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:02,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:02,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:02,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:02,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:02,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:02,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:02,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:02,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:02,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:02,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:02,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:02,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073304752] [2020-10-28 15:06:02,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:02,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:06:02,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104134465] [2020-10-28 15:06:02,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:06:02,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:02,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:06:02,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:06:02,400 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 11 states. [2020-10-28 15:06:02,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:02,917 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-10-28 15:06:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:06:02,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-28 15:06:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:02,918 INFO L225 Difference]: With dead ends: 50 [2020-10-28 15:06:02,918 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 15:06:02,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:06:02,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 15:06:02,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2020-10-28 15:06:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 15:06:02,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-28 15:06:02,932 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2020-10-28 15:06:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:02,932 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-28 15:06:02,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:06:02,933 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-28 15:06:02,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:06:02,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:02,935 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:02,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:06:02,935 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:02,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:02,936 INFO L82 PathProgramCache]: Analyzing trace with hash 154503944, now seen corresponding path program 12 times [2020-10-28 15:06:02,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:02,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824197689] [2020-10-28 15:06:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:02,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:03,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:03,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:06:03,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:03,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-28 15:06:03,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:03,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:03,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:06:03,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:03,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:06:03,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:03,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:03,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:03,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:03,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:03,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:03,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:06:03,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:03,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:03,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:03,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:03,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:03,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:03,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824197689] [2020-10-28 15:06:03,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:03,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:06:03,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313850233] [2020-10-28 15:06:03,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:06:03,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:03,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:06:03,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:06:03,279 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 11 states. [2020-10-28 15:06:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:03,747 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-28 15:06:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:06:03,747 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-28 15:06:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:03,748 INFO L225 Difference]: With dead ends: 40 [2020-10-28 15:06:03,748 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 15:06:03,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:06:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 15:06:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 15:06:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 15:06:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-28 15:06:03,761 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2020-10-28 15:06:03,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:03,761 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-28 15:06:03,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:06:03,762 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-28 15:06:03,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:06:03,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:03,765 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:03,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:06:03,765 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:03,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:03,766 INFO L82 PathProgramCache]: Analyzing trace with hash 78097193, now seen corresponding path program 13 times [2020-10-28 15:06:03,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:03,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67817799] [2020-10-28 15:06:03,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:03,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:03,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:03,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:06:03,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:03,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-28 15:06:03,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:03,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:03,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:06:03,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:03,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:06:03,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:04,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:04,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:04,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:04,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:04,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:04,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:06:04,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:04,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:04,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:04,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:04,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:04,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:04,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67817799] [2020-10-28 15:06:04,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:04,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:06:04,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128918654] [2020-10-28 15:06:04,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:06:04,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:04,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:06:04,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:06:04,161 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 12 states. [2020-10-28 15:06:04,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:04,741 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-28 15:06:04,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:06:04,741 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-28 15:06:04,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:04,742 INFO L225 Difference]: With dead ends: 39 [2020-10-28 15:06:04,742 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 15:06:04,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:06:04,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 15:06:04,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-28 15:06:04,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 15:06:04,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-28 15:06:04,770 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2020-10-28 15:06:04,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:04,771 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-28 15:06:04,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:06:04,771 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-28 15:06:04,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:06:04,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:04,773 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:04,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:06:04,773 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:04,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:04,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1045463784, now seen corresponding path program 14 times [2020-10-28 15:06:04,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:04,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807455723] [2020-10-28 15:06:04,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:04,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:05,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:05,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:06:05,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:05,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-28 15:06:05,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:05,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:05,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:06:05,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:05,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:06:05,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:06:05,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:05,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:05,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:05,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:05,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:05,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:05,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:05,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:05,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:05,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:05,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:05,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:06:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:05,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807455723] [2020-10-28 15:06:05,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:05,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:06:05,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226588740] [2020-10-28 15:06:05,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:06:05,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:05,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:06:05,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:06:05,250 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 12 states. [2020-10-28 15:06:05,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:05,925 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-28 15:06:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:06:05,929 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-28 15:06:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:05,930 INFO L225 Difference]: With dead ends: 43 [2020-10-28 15:06:05,930 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 15:06:05,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:06:05,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 15:06:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-10-28 15:06:05,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 15:06:05,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-28 15:06:05,942 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2020-10-28 15:06:05,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:05,943 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-28 15:06:05,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:06:05,943 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-28 15:06:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:06:05,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:05,943 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:05,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:06:05,944 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:05,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:05,944 INFO L82 PathProgramCache]: Analyzing trace with hash 106837833, now seen corresponding path program 15 times [2020-10-28 15:06:05,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:05,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614583344] [2020-10-28 15:06:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:05,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:06,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:06,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:06:06,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:06,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-28 15:06:06,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:06,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:06,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:06:06,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:06,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:06:06,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:06,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:06,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:06,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:06,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:06,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:06,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:06:06,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:06,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:06,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:06,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:06,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:06,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:06,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614583344] [2020-10-28 15:06:06,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:06,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:06:06,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362806458] [2020-10-28 15:06:06,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:06:06,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:06,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:06:06,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:06:06,342 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 12 states. [2020-10-28 15:06:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:07,032 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-28 15:06:07,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:06:07,034 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-28 15:06:07,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:07,035 INFO L225 Difference]: With dead ends: 46 [2020-10-28 15:06:07,035 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 15:06:07,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:06:07,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 15:06:07,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2020-10-28 15:06:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 15:06:07,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-28 15:06:07,055 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2020-10-28 15:06:07,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:07,055 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-28 15:06:07,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:06:07,055 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-28 15:06:07,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:06:07,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:07,056 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:07,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:06:07,056 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:07,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:07,057 INFO L82 PathProgramCache]: Analyzing trace with hash -477629752, now seen corresponding path program 7 times [2020-10-28 15:06:07,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:07,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562845533] [2020-10-28 15:06:07,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:07,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:07,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:07,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:06:07,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:07,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-28 15:06:07,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:07,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:07,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:06:07,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:07,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:06:07,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:07,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:07,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:07,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:07,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:07,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:07,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:07,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:07,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:07,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:07,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:07,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:07,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:07,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562845533] [2020-10-28 15:06:07,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:07,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:06:07,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047222940] [2020-10-28 15:06:07,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:06:07,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:07,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:06:07,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:06:07,475 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 12 states. [2020-10-28 15:06:08,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:08,133 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-10-28 15:06:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:06:08,134 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-28 15:06:08,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:08,135 INFO L225 Difference]: With dead ends: 51 [2020-10-28 15:06:08,135 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 15:06:08,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:06:08,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 15:06:08,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2020-10-28 15:06:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 15:06:08,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-28 15:06:08,148 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2020-10-28 15:06:08,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:08,148 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-28 15:06:08,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:06:08,148 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-28 15:06:08,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:06:08,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:08,149 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:08,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:06:08,149 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:08,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:08,150 INFO L82 PathProgramCache]: Analyzing trace with hash -804618148, now seen corresponding path program 16 times [2020-10-28 15:06:08,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:08,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150279035] [2020-10-28 15:06:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:08,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:08,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:08,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:06:08,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:08,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-28 15:06:08,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:08,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:08,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:06:08,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:08,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:06:08,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:08,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:08,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:08,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:08,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:08,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:08,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:08,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:08,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:08,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:08,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:08,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:08,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:08,629 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 15:06:08,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150279035] [2020-10-28 15:06:08,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:08,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:06:08,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280140546] [2020-10-28 15:06:08,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:06:08,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:08,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:06:08,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:06:08,631 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 11 states. [2020-10-28 15:06:09,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:09,123 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-10-28 15:06:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:06:09,124 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-28 15:06:09,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:09,125 INFO L225 Difference]: With dead ends: 41 [2020-10-28 15:06:09,125 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 15:06:09,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:06:09,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 15:06:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-28 15:06:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 15:06:09,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-28 15:06:09,139 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-10-28 15:06:09,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:09,140 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-28 15:06:09,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:06:09,140 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-28 15:06:09,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:06:09,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:09,140 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:09,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:06:09,141 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:09,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:09,141 INFO L82 PathProgramCache]: Analyzing trace with hash -881024899, now seen corresponding path program 17 times [2020-10-28 15:06:09,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:09,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110774079] [2020-10-28 15:06:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:09,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:09,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:06:09,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:09,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-28 15:06:09,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:09,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:09,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:06:09,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:09,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:06:09,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:09,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:09,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:09,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:09,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:09,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:06:09,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:09,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:09,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:09,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:09,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:09,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:06:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:09,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110774079] [2020-10-28 15:06:09,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:09,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:06:09,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380233355] [2020-10-28 15:06:09,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:06:09,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:09,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:06:09,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:09,652 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 13 states. [2020-10-28 15:06:10,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:10,507 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-28 15:06:10,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:06:10,507 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-28 15:06:10,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:10,508 INFO L225 Difference]: With dead ends: 48 [2020-10-28 15:06:10,508 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 15:06:10,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:06:10,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 15:06:10,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2020-10-28 15:06:10,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 15:06:10,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-28 15:06:10,530 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-10-28 15:06:10,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:10,532 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-28 15:06:10,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:06:10,532 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-28 15:06:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:06:10,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:10,532 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:10,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:06:10,533 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:10,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:10,537 INFO L82 PathProgramCache]: Analyzing trace with hash 86341692, now seen corresponding path program 18 times [2020-10-28 15:06:10,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:10,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699374681] [2020-10-28 15:06:10,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:10,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:10,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:10,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:06:10,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:10,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-28 15:06:10,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:10,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:10,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:06:10,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:10,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:06:10,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:11,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:11,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:11,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:11,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:11,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:11,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:11,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:11,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:11,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:11,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:11,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:11,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:11,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699374681] [2020-10-28 15:06:11,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:11,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:06:11,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298424362] [2020-10-28 15:06:11,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:06:11,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:11,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:06:11,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:11,022 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 13 states. [2020-10-28 15:06:11,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:11,888 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-28 15:06:11,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:06:11,889 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-28 15:06:11,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:11,890 INFO L225 Difference]: With dead ends: 52 [2020-10-28 15:06:11,890 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 15:06:11,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:06:11,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 15:06:11,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2020-10-28 15:06:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 15:06:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-28 15:06:11,903 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-10-28 15:06:11,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:11,903 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-28 15:06:11,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:06:11,903 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-28 15:06:11,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:06:11,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:11,904 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:11,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:06:11,904 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:11,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:11,904 INFO L82 PathProgramCache]: Analyzing trace with hash -852284259, now seen corresponding path program 19 times [2020-10-28 15:06:11,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:11,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269591832] [2020-10-28 15:06:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:11,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:12,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:12,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:06:12,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:12,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-28 15:06:12,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:12,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:12,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:06:12,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:12,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:06:12,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:12,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:12,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:12,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:12,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:12,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:12,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:12,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:12,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:12,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:12,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:12,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:12,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:12,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269591832] [2020-10-28 15:06:12,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:12,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:06:12,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626460191] [2020-10-28 15:06:12,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:06:12,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:12,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:06:12,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:12,416 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 13 states. [2020-10-28 15:06:13,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:13,201 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-10-28 15:06:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:06:13,204 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-28 15:06:13,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:13,205 INFO L225 Difference]: With dead ends: 55 [2020-10-28 15:06:13,205 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 15:06:13,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:06:13,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 15:06:13,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2020-10-28 15:06:13,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 15:06:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-28 15:06:13,222 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-10-28 15:06:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:13,222 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-28 15:06:13,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:06:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-28 15:06:13,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:06:13,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:13,223 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:13,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:06:13,223 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:13,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:13,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1436751844, now seen corresponding path program 8 times [2020-10-28 15:06:13,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:13,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606190773] [2020-10-28 15:06:13,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:13,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:13,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:13,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:06:13,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:13,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-28 15:06:13,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:13,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:13,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:06:13,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:13,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:06:13,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:13,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:13,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:13,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:13,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:13,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:13,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:13,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:13,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:13,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:13,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:13,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:13,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:13,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606190773] [2020-10-28 15:06:13,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:13,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:06:13,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983883278] [2020-10-28 15:06:13,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:06:13,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:13,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:06:13,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:13,696 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 13 states. [2020-10-28 15:06:14,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:14,486 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2020-10-28 15:06:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:06:14,486 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-28 15:06:14,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:14,487 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:06:14,487 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 15:06:14,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:06:14,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 15:06:14,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 34. [2020-10-28 15:06:14,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 15:06:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-28 15:06:14,503 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 22 [2020-10-28 15:06:14,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:14,503 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-28 15:06:14,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:06:14,503 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-28 15:06:14,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:06:14,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:14,504 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:14,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:06:14,504 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:14,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1895977353, now seen corresponding path program 20 times [2020-10-28 15:06:14,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:14,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488210182] [2020-10-28 15:06:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:14,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:14,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:14,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:06:14,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:14,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-28 15:06:14,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:14,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:14,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:06:14,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:14,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:06:14,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:14,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:14,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:14,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:14,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:14,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:14,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:14,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:14,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:14,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:14,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:14,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:14,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:14,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488210182] [2020-10-28 15:06:14,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:14,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:06:14,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541730139] [2020-10-28 15:06:14,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:06:14,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:14,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:06:14,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:14,930 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 13 states. [2020-10-28 15:06:15,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:15,573 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-10-28 15:06:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:06:15,573 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-10-28 15:06:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:15,574 INFO L225 Difference]: With dead ends: 45 [2020-10-28 15:06:15,574 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 15:06:15,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:06:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 15:06:15,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-28 15:06:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 15:06:15,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-28 15:06:15,586 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 23 [2020-10-28 15:06:15,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:15,586 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-28 15:06:15,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:06:15,586 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-28 15:06:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:06:15,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:15,587 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:15,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:06:15,587 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:15,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:15,587 INFO L82 PathProgramCache]: Analyzing trace with hash -472631928, now seen corresponding path program 21 times [2020-10-28 15:06:15,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:15,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247890630] [2020-10-28 15:06:15,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:15,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:15,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:15,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:06:15,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:15,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-28 15:06:15,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:15,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:15,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:06:15,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:15,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:06:15,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:16,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:16,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:16,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:16,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:16,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:16,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:16,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:16,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:16,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:16,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:16,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:16,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:16,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247890630] [2020-10-28 15:06:16,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:16,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:06:16,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574136611] [2020-10-28 15:06:16,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:06:16,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:16,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:06:16,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:06:16,069 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 14 states. [2020-10-28 15:06:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:16,781 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-28 15:06:16,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:06:16,782 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-28 15:06:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:16,783 INFO L225 Difference]: With dead ends: 44 [2020-10-28 15:06:16,783 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 15:06:16,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:06:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 15:06:16,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-10-28 15:06:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 15:06:16,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-28 15:06:16,800 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2020-10-28 15:06:16,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:16,800 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-28 15:06:16,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:06:16,800 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-28 15:06:16,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:06:16,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:16,801 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:16,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:06:16,801 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:16,801 INFO L82 PathProgramCache]: Analyzing trace with hash -549038679, now seen corresponding path program 22 times [2020-10-28 15:06:16,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:16,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111255598] [2020-10-28 15:06:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:16,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:17,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:06:17,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:17,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-28 15:06:17,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:17,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:17,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:06:17,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:17,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:06:17,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:17,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:17,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:17,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:17,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:17,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:17,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:17,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:17,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:17,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:17,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:17,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:17,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111255598] [2020-10-28 15:06:17,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:17,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:06:17,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512960427] [2020-10-28 15:06:17,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:06:17,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:17,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:06:17,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:06:17,296 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 14 states. [2020-10-28 15:06:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:18,223 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-28 15:06:18,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:06:18,224 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-28 15:06:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:18,225 INFO L225 Difference]: With dead ends: 49 [2020-10-28 15:06:18,225 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 15:06:18,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:06:18,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 15:06:18,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-10-28 15:06:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 15:06:18,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-28 15:06:18,239 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2020-10-28 15:06:18,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:18,240 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-28 15:06:18,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:06:18,240 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-28 15:06:18,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:06:18,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:18,240 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:18,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 15:06:18,241 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:18,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:18,241 INFO L82 PathProgramCache]: Analyzing trace with hash 418327912, now seen corresponding path program 23 times [2020-10-28 15:06:18,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:18,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194937805] [2020-10-28 15:06:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:18,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:18,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:06:18,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:18,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-28 15:06:18,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:18,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:18,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:06:18,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:18,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:06:18,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:18,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:18,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:18,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:18,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:18,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:18,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:18,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:18,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:18,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:18,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:18,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:18,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194937805] [2020-10-28 15:06:18,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:18,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:06:18,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068125669] [2020-10-28 15:06:18,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:06:18,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:18,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:06:18,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:06:18,720 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 14 states. [2020-10-28 15:06:19,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:19,647 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-28 15:06:19,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:06:19,647 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-28 15:06:19,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:19,648 INFO L225 Difference]: With dead ends: 53 [2020-10-28 15:06:19,648 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 15:06:19,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:06:19,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 15:06:19,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2020-10-28 15:06:19,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 15:06:19,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-28 15:06:19,663 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2020-10-28 15:06:19,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:19,664 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-28 15:06:19,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:06:19,664 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-28 15:06:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:06:19,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:19,664 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:19,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 15:06:19,664 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:19,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:19,665 INFO L82 PathProgramCache]: Analyzing trace with hash -520298039, now seen corresponding path program 24 times [2020-10-28 15:06:19,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:19,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110192795] [2020-10-28 15:06:19,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:19,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:19,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:19,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:06:19,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:19,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-28 15:06:19,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:19,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:19,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:06:19,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:19,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:06:19,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:20,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:20,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:20,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:20,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:20,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:20,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:20,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:20,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:20,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:20,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:20,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:20,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:20,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110192795] [2020-10-28 15:06:20,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:20,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:06:20,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357374350] [2020-10-28 15:06:20,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:06:20,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:20,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:06:20,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:06:20,167 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 14 states. [2020-10-28 15:06:21,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:21,085 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-28 15:06:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:06:21,086 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-28 15:06:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:21,087 INFO L225 Difference]: With dead ends: 56 [2020-10-28 15:06:21,087 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 15:06:21,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:06:21,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 15:06:21,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2020-10-28 15:06:21,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 15:06:21,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-28 15:06:21,105 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2020-10-28 15:06:21,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:21,106 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-28 15:06:21,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:06:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-28 15:06:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:06:21,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:21,106 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:21,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 15:06:21,106 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:21,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:21,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1104765624, now seen corresponding path program 9 times [2020-10-28 15:06:21,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:21,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187985144] [2020-10-28 15:06:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:21,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:21,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:21,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:06:21,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:21,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-28 15:06:21,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:21,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:21,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:06:21,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:21,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:06:21,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:21,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:21,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:21,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:21,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:21,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:21,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:21,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:21,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:21,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:21,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:21,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:21,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:21,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187985144] [2020-10-28 15:06:21,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:21,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:06:21,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020971119] [2020-10-28 15:06:21,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:06:21,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:21,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:06:21,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:06:21,570 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 14 states. [2020-10-28 15:06:22,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:22,495 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2020-10-28 15:06:22,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:06:22,496 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-28 15:06:22,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:22,497 INFO L225 Difference]: With dead ends: 61 [2020-10-28 15:06:22,497 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 15:06:22,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:06:22,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 15:06:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2020-10-28 15:06:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 15:06:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-28 15:06:22,516 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2020-10-28 15:06:22,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:22,516 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-28 15:06:22,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:06:22,516 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-28 15:06:22,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:06:22,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:22,517 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:22,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 15:06:22,517 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:22,517 INFO L82 PathProgramCache]: Analyzing trace with hash -697351715, now seen corresponding path program 25 times [2020-10-28 15:06:22,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:22,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474569283] [2020-10-28 15:06:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:22,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:22,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:22,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:06:22,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:22,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-28 15:06:22,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:22,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:22,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:06:22,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:22,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:06:22,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:23,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:23,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:23,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:23,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:23,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:23,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:23,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:23,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:23,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:23,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:23,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:23,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:23,156 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 15:06:23,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474569283] [2020-10-28 15:06:23,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:23,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:06:23,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190154935] [2020-10-28 15:06:23,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:06:23,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:23,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:06:23,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:06:23,158 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 12 states. [2020-10-28 15:06:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:23,774 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-10-28 15:06:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:06:23,775 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-28 15:06:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:23,776 INFO L225 Difference]: With dead ends: 46 [2020-10-28 15:06:23,776 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 15:06:23,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:06:23,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 15:06:23,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-10-28 15:06:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 15:06:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 15:06:23,792 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2020-10-28 15:06:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:23,792 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 15:06:23,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:06:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 15:06:23,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:06:23,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:23,792 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:23,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 15:06:23,793 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:23,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1229006300, now seen corresponding path program 26 times [2020-10-28 15:06:23,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:23,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937494885] [2020-10-28 15:06:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:23,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:24,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:24,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:06:24,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:24,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-28 15:06:24,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:24,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:24,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:06:24,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:24,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:06:24,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:24,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:24,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:24,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:24,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:24,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:24,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:06:24,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:24,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:24,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:24,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:24,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:24,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:24,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937494885] [2020-10-28 15:06:24,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:24,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:06:24,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215181048] [2020-10-28 15:06:24,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:06:24,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:24,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:06:24,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:06:24,380 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 15 states. [2020-10-28 15:06:25,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:25,514 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-28 15:06:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:06:25,515 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-28 15:06:25,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:25,516 INFO L225 Difference]: With dead ends: 54 [2020-10-28 15:06:25,516 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 15:06:25,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:06:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 15:06:25,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-10-28 15:06:25,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 15:06:25,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 15:06:25,535 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2020-10-28 15:06:25,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:25,535 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 15:06:25,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:06:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 15:06:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:06:25,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:25,535 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:25,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 15:06:25,535 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:25,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:25,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1152599549, now seen corresponding path program 27 times [2020-10-28 15:06:25,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:25,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521653960] [2020-10-28 15:06:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:25,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:25,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:25,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:06:25,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:25,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-28 15:06:25,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:25,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:25,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:06:25,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:25,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:06:25,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:26,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:26,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:26,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:26,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:26,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:26,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:26,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:26,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:26,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:26,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521653960] [2020-10-28 15:06:26,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:26,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:06:26,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279084352] [2020-10-28 15:06:26,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:06:26,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:26,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:06:26,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:06:26,117 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 15 states. [2020-10-28 15:06:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:27,282 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2020-10-28 15:06:27,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:06:27,283 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-28 15:06:27,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:27,284 INFO L225 Difference]: With dead ends: 59 [2020-10-28 15:06:27,284 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 15:06:27,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:06:27,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 15:06:27,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-10-28 15:06:27,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 15:06:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 15:06:27,307 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2020-10-28 15:06:27,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:27,307 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 15:06:27,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:06:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 15:06:27,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:06:27,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:27,308 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:27,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 15:06:27,308 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:27,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:27,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2119966140, now seen corresponding path program 28 times [2020-10-28 15:06:27,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:27,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499850838] [2020-10-28 15:06:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:27,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:27,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:27,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:06:27,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:27,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-28 15:06:27,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:27,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:27,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:06:27,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:27,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:06:27,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:27,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:27,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:27,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:27,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:27,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:27,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:06:27,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:27,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:27,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:27,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:27,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:27,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:27,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499850838] [2020-10-28 15:06:27,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:27,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:06:27,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480863457] [2020-10-28 15:06:27,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:06:27,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:27,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:06:27,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:06:27,893 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 15 states. [2020-10-28 15:06:29,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:29,004 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2020-10-28 15:06:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:06:29,005 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-28 15:06:29,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:29,006 INFO L225 Difference]: With dead ends: 63 [2020-10-28 15:06:29,006 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 15:06:29,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2020-10-28 15:06:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 15:06:29,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2020-10-28 15:06:29,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 15:06:29,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 15:06:29,033 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2020-10-28 15:06:29,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:29,033 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 15:06:29,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:06:29,033 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 15:06:29,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:06:29,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:29,034 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:29,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 15:06:29,034 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:29,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:29,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1181340189, now seen corresponding path program 29 times [2020-10-28 15:06:29,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:29,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129338849] [2020-10-28 15:06:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:29,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:29,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:29,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:06:29,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:29,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-28 15:06:29,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:29,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:29,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:06:29,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:29,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:06:29,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:29,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:29,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:29,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:29,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:29,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:29,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:06:29,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:29,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:29,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:29,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:29,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:29,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:29,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129338849] [2020-10-28 15:06:29,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:29,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:06:29,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865521773] [2020-10-28 15:06:29,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:06:29,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:29,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:06:29,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:06:29,675 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 15 states. [2020-10-28 15:06:30,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:30,733 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-28 15:06:30,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:06:30,734 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-28 15:06:30,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:30,734 INFO L225 Difference]: With dead ends: 66 [2020-10-28 15:06:30,734 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 15:06:30,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:06:30,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 15:06:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2020-10-28 15:06:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 15:06:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 15:06:30,761 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2020-10-28 15:06:30,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:30,761 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 15:06:30,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:06:30,761 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 15:06:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:06:30,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:30,762 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:30,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 15:06:30,762 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:30,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:30,762 INFO L82 PathProgramCache]: Analyzing trace with hash 596872604, now seen corresponding path program 10 times [2020-10-28 15:06:30,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:30,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978760784] [2020-10-28 15:06:30,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:30,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:31,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:31,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:06:31,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:31,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-28 15:06:31,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:31,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:31,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:06:31,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:31,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:06:31,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:31,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:31,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:31,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:31,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:31,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:31,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:06:31,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:31,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:31,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:31,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:31,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978760784] [2020-10-28 15:06:31,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:31,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:06:31,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928214405] [2020-10-28 15:06:31,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:06:31,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:31,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:06:31,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:06:31,374 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 15 states. [2020-10-28 15:06:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:32,465 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-10-28 15:06:32,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:06:32,466 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-28 15:06:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:32,467 INFO L225 Difference]: With dead ends: 71 [2020-10-28 15:06:32,467 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 15:06:32,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:06:32,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 15:06:32,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2020-10-28 15:06:32,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 15:06:32,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-28 15:06:32,488 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 24 [2020-10-28 15:06:32,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:32,488 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-28 15:06:32,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:06:32,488 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-28 15:06:32,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:06:32,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:32,489 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:32,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 15:06:32,489 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:32,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:32,490 INFO L82 PathProgramCache]: Analyzing trace with hash 926269480, now seen corresponding path program 30 times [2020-10-28 15:06:32,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:32,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22293499] [2020-10-28 15:06:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:32,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:32,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:32,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:06:32,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:32,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-28 15:06:32,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:32,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:06:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:06:32,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:33,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:33,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:33,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:33,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:33,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:33,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:33,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:33,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:33,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:33,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:33,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:33,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:33,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22293499] [2020-10-28 15:06:33,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:33,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:06:33,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493975524] [2020-10-28 15:06:33,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:06:33,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:33,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:06:33,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:06:33,025 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 15 states. [2020-10-28 15:06:33,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:33,868 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-28 15:06:33,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:06:33,868 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-10-28 15:06:33,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:33,869 INFO L225 Difference]: With dead ends: 50 [2020-10-28 15:06:33,869 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 15:06:33,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:06:33,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 15:06:33,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-28 15:06:33,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 15:06:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 15:06:33,888 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 25 [2020-10-28 15:06:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:33,888 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 15:06:33,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:06:33,888 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 15:06:33,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:06:33,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:33,888 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:33,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 15:06:33,888 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:33,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:33,889 INFO L82 PathProgramCache]: Analyzing trace with hash 513825801, now seen corresponding path program 31 times [2020-10-28 15:06:33,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:33,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944774486] [2020-10-28 15:06:33,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:33,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:34,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:34,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:06:34,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:34,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-28 15:06:34,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:34,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:34,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:06:34,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:34,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:06:34,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:34,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:34,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:34,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:34,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:34,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:34,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:06:34,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:34,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:34,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:34,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:34,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:34,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:34,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944774486] [2020-10-28 15:06:34,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:34,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:06:34,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202327603] [2020-10-28 15:06:34,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:06:34,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:34,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:06:34,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:06:34,482 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 16 states. [2020-10-28 15:06:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:35,380 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-28 15:06:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:06:35,380 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-28 15:06:35,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:35,381 INFO L225 Difference]: With dead ends: 49 [2020-10-28 15:06:35,381 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 15:06:35,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:06:35,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 15:06:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-10-28 15:06:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:06:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-28 15:06:35,402 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-10-28 15:06:35,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:35,403 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-28 15:06:35,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:06:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-28 15:06:35,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:06:35,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:35,403 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:35,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 15:06:35,404 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:35,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:35,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1854783480, now seen corresponding path program 32 times [2020-10-28 15:06:35,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:35,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70410670] [2020-10-28 15:06:35,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:35,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:35,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:35,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:06:35,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:35,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-28 15:06:35,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:35,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:35,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:06:35,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:35,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:06:35,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:35,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:36,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:36,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:36,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:36,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:36,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:36,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:36,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:36,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:36,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:36,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:36,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:36,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70410670] [2020-10-28 15:06:36,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:36,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:06:36,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684628276] [2020-10-28 15:06:36,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:06:36,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:36,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:06:36,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:06:36,012 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 16 states. [2020-10-28 15:06:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:37,243 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-28 15:06:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:06:37,245 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-28 15:06:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:37,246 INFO L225 Difference]: With dead ends: 55 [2020-10-28 15:06:37,246 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 15:06:37,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:06:37,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 15:06:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-10-28 15:06:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:06:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-28 15:06:37,286 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-10-28 15:06:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:37,287 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-28 15:06:37,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:06:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-28 15:06:37,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:06:37,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:37,287 INFO L422 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:37,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 15:06:37,288 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:37,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:37,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1931190231, now seen corresponding path program 33 times [2020-10-28 15:06:37,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:37,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397928412] [2020-10-28 15:06:37,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:37,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:37,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:37,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:06:37,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:37,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-28 15:06:37,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:37,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:37,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:06:37,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:37,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:06:37,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:37,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:37,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:37,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:37,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:37,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:37,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:06:37,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:37,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:37,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:37,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:37,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:37,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:37,872 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 15:06:37,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397928412] [2020-10-28 15:06:37,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:37,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:06:37,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725526727] [2020-10-28 15:06:37,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:06:37,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:37,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:06:37,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:06:37,874 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 16 states. [2020-10-28 15:06:39,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:39,189 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-28 15:06:39,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:06:39,189 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-28 15:06:39,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:39,190 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:06:39,190 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 15:06:39,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 15:06:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 15:06:39,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-10-28 15:06:39,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:06:39,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-28 15:06:39,217 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-10-28 15:06:39,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:39,217 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-28 15:06:39,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:06:39,217 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-28 15:06:39,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:06:39,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:39,218 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:39,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 15:06:39,218 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:39,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:39,218 INFO L82 PathProgramCache]: Analyzing trace with hash -963823640, now seen corresponding path program 34 times [2020-10-28 15:06:39,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:39,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58548198] [2020-10-28 15:06:39,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:39,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:39,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:39,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:06:39,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:39,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-28 15:06:39,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:39,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:39,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:06:39,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:39,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:06:39,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:39,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:39,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:39,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:39,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:39,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:39,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:06:39,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:39,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:39,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:39,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:39,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:39,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:39,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58548198] [2020-10-28 15:06:39,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:39,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:06:39,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118392568] [2020-10-28 15:06:39,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:06:39,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:39,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:06:39,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:06:39,853 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 16 states. [2020-10-28 15:06:41,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:41,107 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-28 15:06:41,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:06:41,107 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-28 15:06:41,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:41,108 INFO L225 Difference]: With dead ends: 64 [2020-10-28 15:06:41,108 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 15:06:41,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:06:41,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 15:06:41,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2020-10-28 15:06:41,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:06:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-28 15:06:41,141 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-10-28 15:06:41,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:41,141 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-28 15:06:41,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:06:41,141 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-28 15:06:41,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:06:41,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:41,142 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:41,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 15:06:41,142 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:41,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:41,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1902449591, now seen corresponding path program 35 times [2020-10-28 15:06:41,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:41,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681949285] [2020-10-28 15:06:41,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:41,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:41,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:41,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:06:41,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:41,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-28 15:06:41,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:41,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:41,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:06:41,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:41,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:06:41,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:41,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:41,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:41,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:41,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:41,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:41,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:41,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:41,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:41,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:41,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:41,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:41,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:41,721 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 15:06:41,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681949285] [2020-10-28 15:06:41,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:41,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:06:41,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408075493] [2020-10-28 15:06:41,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:06:41,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:41,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:06:41,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:06:41,722 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 16 states. [2020-10-28 15:06:42,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:42,910 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2020-10-28 15:06:42,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:06:42,911 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-28 15:06:42,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:42,912 INFO L225 Difference]: With dead ends: 67 [2020-10-28 15:06:42,912 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 15:06:42,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2020-10-28 15:06:42,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 15:06:42,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 37. [2020-10-28 15:06:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:06:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-28 15:06:42,939 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-10-28 15:06:42,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:42,940 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-28 15:06:42,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:06:42,940 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-28 15:06:42,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:06:42,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:42,940 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:42,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 15:06:42,940 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:42,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:42,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1808050120, now seen corresponding path program 11 times [2020-10-28 15:06:42,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:42,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872855463] [2020-10-28 15:06:42,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:42,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:43,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:43,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:06:43,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:43,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-28 15:06:43,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:43,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:43,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:06:43,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:43,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:06:43,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:43,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:43,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:43,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:43,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:43,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:43,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:43,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:43,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:43,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:43,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:43,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:43,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:43,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872855463] [2020-10-28 15:06:43,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:43,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:06:43,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529624464] [2020-10-28 15:06:43,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:06:43,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:43,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:06:43,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:06:43,528 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 16 states. [2020-10-28 15:06:44,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:44,746 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2020-10-28 15:06:44,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:06:44,747 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-28 15:06:44,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:44,748 INFO L225 Difference]: With dead ends: 72 [2020-10-28 15:06:44,748 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 15:06:44,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:06:44,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 15:06:44,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 39. [2020-10-28 15:06:44,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 15:06:44,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-28 15:06:44,773 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 25 [2020-10-28 15:06:44,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:44,773 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-28 15:06:44,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:06:44,774 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-28 15:06:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:06:44,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:44,774 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:44,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 15:06:44,774 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:44,775 INFO L82 PathProgramCache]: Analyzing trace with hash -181933188, now seen corresponding path program 36 times [2020-10-28 15:06:44,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:44,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544184152] [2020-10-28 15:06:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:44,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:45,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:45,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:06:45,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:45,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-28 15:06:45,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:45,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:45,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:06:45,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:45,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:06:45,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:45,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:45,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:45,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:45,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:45,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:45,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:45,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:45,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:45,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:45,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:45,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:45,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:45,501 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 15:06:45,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544184152] [2020-10-28 15:06:45,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:45,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:06:45,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960939370] [2020-10-28 15:06:45,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:06:45,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:45,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:06:45,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:45,503 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 13 states. [2020-10-28 15:06:46,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:46,297 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-10-28 15:06:46,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:06:46,298 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-28 15:06:46,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:46,298 INFO L225 Difference]: With dead ends: 51 [2020-10-28 15:06:46,299 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 15:06:46,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:06:46,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 15:06:46,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2020-10-28 15:06:46,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:06:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-28 15:06:46,327 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2020-10-28 15:06:46,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:46,327 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-28 15:06:46,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:06:46,327 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-28 15:06:46,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:06:46,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:46,328 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:46,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 15:06:46,328 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:46,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:46,329 INFO L82 PathProgramCache]: Analyzing trace with hash -594376867, now seen corresponding path program 37 times [2020-10-28 15:06:46,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:46,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116408374] [2020-10-28 15:06:46,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:46,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:46,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:46,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:06:46,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:46,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-28 15:06:46,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:46,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:46,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:06:46,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:46,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:06:46,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:46,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:46,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:46,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:46,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:46,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:46,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:46,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:46,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:46,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:46,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:46,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:46,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:46,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116408374] [2020-10-28 15:06:46,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:46,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:06:46,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896002762] [2020-10-28 15:06:46,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:06:46,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:46,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:06:46,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:06:46,939 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 17 states. [2020-10-28 15:06:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:48,375 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-28 15:06:48,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:06:48,376 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-28 15:06:48,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:48,377 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:06:48,377 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 15:06:48,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 15:06:48,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 15:06:48,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2020-10-28 15:06:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:06:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-28 15:06:48,411 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2020-10-28 15:06:48,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:48,411 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-28 15:06:48,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:06:48,411 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-28 15:06:48,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:06:48,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:48,411 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:48,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 15:06:48,412 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:48,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:48,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1331981148, now seen corresponding path program 38 times [2020-10-28 15:06:48,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:48,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700827547] [2020-10-28 15:06:48,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:48,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:48,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:48,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:06:48,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:48,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-28 15:06:48,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:48,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:48,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:06:48,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:48,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:06:48,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:49,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:49,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:49,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:49,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:49,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:49,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:49,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:49,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:49,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:49,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:49,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:49,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:06:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:49,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700827547] [2020-10-28 15:06:49,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:49,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:06:49,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356945077] [2020-10-28 15:06:49,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:06:49,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:06:49,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:06:49,096 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 17 states. [2020-10-28 15:06:50,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:50,716 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-28 15:06:50,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:06:50,717 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-28 15:06:50,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:50,718 INFO L225 Difference]: With dead ends: 66 [2020-10-28 15:06:50,718 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 15:06:50,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 15:06:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 15:06:50,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2020-10-28 15:06:50,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:06:50,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-28 15:06:50,753 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2020-10-28 15:06:50,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:50,753 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-28 15:06:50,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:06:50,753 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-28 15:06:50,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:06:50,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:50,753 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:50,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 15:06:50,754 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:50,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:50,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1255574397, now seen corresponding path program 39 times [2020-10-28 15:06:50,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:50,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096760332] [2020-10-28 15:06:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:50,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:51,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:51,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:06:51,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:51,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-28 15:06:51,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:51,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:51,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:06:51,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:51,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:06:51,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:51,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:51,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:51,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:51,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:51,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:51,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:51,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:51,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:51,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:51,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:51,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:51,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:51,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096760332] [2020-10-28 15:06:51,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:51,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:06:51,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488828585] [2020-10-28 15:06:51,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:06:51,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:51,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:06:51,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:06:51,440 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 17 states. [2020-10-28 15:06:53,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:53,018 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-10-28 15:06:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:06:53,019 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-28 15:06:53,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:53,020 INFO L225 Difference]: With dead ends: 71 [2020-10-28 15:06:53,020 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 15:06:53,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:06:53,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 15:06:53,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 40. [2020-10-28 15:06:53,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:06:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-28 15:06:53,050 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2020-10-28 15:06:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:53,050 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-28 15:06:53,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:06:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-28 15:06:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:06:53,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:53,051 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:53,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 15:06:53,051 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:53,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:53,051 INFO L82 PathProgramCache]: Analyzing trace with hash -2072026308, now seen corresponding path program 40 times [2020-10-28 15:06:53,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:53,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642761519] [2020-10-28 15:06:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:53,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:53,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:53,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:06:53,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:53,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-28 15:06:53,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:53,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:53,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:06:53,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:53,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:06:53,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:53,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:53,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:53,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:53,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:53,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:53,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:53,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:53,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:53,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:53,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:53,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:53,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:53,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642761519] [2020-10-28 15:06:53,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:53,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:06:53,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491617370] [2020-10-28 15:06:53,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:06:53,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:53,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:06:53,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:06:53,701 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 17 states. [2020-10-28 15:06:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:55,099 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-28 15:06:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:06:55,100 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-28 15:06:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:55,100 INFO L225 Difference]: With dead ends: 75 [2020-10-28 15:06:55,101 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 15:06:55,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 15:06:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 15:06:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 40. [2020-10-28 15:06:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:06:55,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-28 15:06:55,136 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2020-10-28 15:06:55,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:55,137 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-28 15:06:55,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:06:55,137 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-28 15:06:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:06:55,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:55,137 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:55,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 15:06:55,137 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:55,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:55,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1284315037, now seen corresponding path program 41 times [2020-10-28 15:06:55,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:55,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45406942] [2020-10-28 15:06:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:55,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:55,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:55,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:06:55,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:55,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-28 15:06:55,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:55,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:55,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:06:55,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:55,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:06:55,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:55,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:55,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:55,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:55,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:55,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:55,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:55,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:55,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:55,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:55,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:55,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:55,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:55,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45406942] [2020-10-28 15:06:55,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:55,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:06:55,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57998988] [2020-10-28 15:06:55,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:06:55,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:55,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:06:55,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:06:55,775 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 17 states. [2020-10-28 15:06:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:57,163 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-10-28 15:06:57,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:06:57,164 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-28 15:06:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:57,165 INFO L225 Difference]: With dead ends: 78 [2020-10-28 15:06:57,165 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 15:06:57,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:06:57,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 15:06:57,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2020-10-28 15:06:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:06:57,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-28 15:06:57,196 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2020-10-28 15:06:57,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:57,196 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-28 15:06:57,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:06:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-28 15:06:57,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:06:57,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:57,197 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:57,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 15:06:57,197 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:57,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:57,197 INFO L82 PathProgramCache]: Analyzing trace with hash 699847452, now seen corresponding path program 12 times [2020-10-28 15:06:57,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:57,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509738252] [2020-10-28 15:06:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:57,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:57,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:57,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:06:57,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:57,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-28 15:06:57,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:57,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:57,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:06:57,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:57,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:06:57,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:57,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:57,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:57,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:57,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:57,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:57,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:57,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:57,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:57,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:57,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:57,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:57,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:57,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509738252] [2020-10-28 15:06:57,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:57,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:06:57,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345267412] [2020-10-28 15:06:57,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:06:57,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:57,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:06:57,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:06:57,905 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 17 states. [2020-10-28 15:06:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:59,272 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2020-10-28 15:06:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:06:59,273 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-28 15:06:59,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:59,274 INFO L225 Difference]: With dead ends: 83 [2020-10-28 15:06:59,274 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 15:06:59,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:06:59,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 15:06:59,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 42. [2020-10-28 15:06:59,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 15:06:59,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-28 15:06:59,311 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 26 [2020-10-28 15:06:59,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:59,311 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-28 15:06:59,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:06:59,311 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-28 15:06:59,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:06:59,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:59,311 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:59,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 15:06:59,312 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:59,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:59,312 INFO L82 PathProgramCache]: Analyzing trace with hash -275625367, now seen corresponding path program 42 times [2020-10-28 15:06:59,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:59,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223431317] [2020-10-28 15:06:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:59,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:59,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:59,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:06:59,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:59,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-28 15:06:59,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:59,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:59,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:06:59,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:59,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:06:59,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:59,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:59,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:59,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:59,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:59,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:59,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:59,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:59,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:59,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:59,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:59,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:59,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:59,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223431317] [2020-10-28 15:06:59,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:59,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:06:59,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992926532] [2020-10-28 15:06:59,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:06:59,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:59,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:06:59,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:06:59,951 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 17 states. [2020-10-28 15:07:01,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:01,012 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-28 15:07:01,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:07:01,013 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-10-28 15:07:01,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:01,013 INFO L225 Difference]: With dead ends: 55 [2020-10-28 15:07:01,014 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 15:07:01,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:07:01,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 15:07:01,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-28 15:07:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:07:01,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-28 15:07:01,047 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 27 [2020-10-28 15:07:01,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:01,047 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-28 15:07:01,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:07:01,047 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-28 15:07:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:07:01,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:01,047 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:01,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 15:07:01,048 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:01,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:01,048 INFO L82 PathProgramCache]: Analyzing trace with hash -176477528, now seen corresponding path program 43 times [2020-10-28 15:07:01,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:01,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558322302] [2020-10-28 15:07:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:01,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:01,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:01,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:07:01,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:01,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-28 15:07:01,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:01,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:07:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:07:01,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:01,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:01,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:01,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:01,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:01,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:01,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:01,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:01,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:01,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:01,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:01,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:01,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:01,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558322302] [2020-10-28 15:07:01,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:01,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:07:01,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443305544] [2020-10-28 15:07:01,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:07:01,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:01,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:07:01,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:07:01,693 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 18 states. [2020-10-28 15:07:02,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:02,855 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-28 15:07:02,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:07:02,856 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-28 15:07:02,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:02,857 INFO L225 Difference]: With dead ends: 54 [2020-10-28 15:07:02,857 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 15:07:02,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:07:02,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 15:07:02,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-10-28 15:07:02,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 15:07:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-28 15:07:02,898 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 27 [2020-10-28 15:07:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:02,898 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-28 15:07:02,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:07:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-28 15:07:02,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:07:02,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:02,899 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:02,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 15:07:02,899 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:02,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:02,900 INFO L82 PathProgramCache]: Analyzing trace with hash -588921207, now seen corresponding path program 44 times [2020-10-28 15:07:02,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:02,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397289492] [2020-10-28 15:07:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:02,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:03,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:07:03,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:03,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-28 15:07:03,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:03,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:03,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:07:03,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:03,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:07:03,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:03,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:03,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:03,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:03,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:03,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:03,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:03,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:03,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:03,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:03,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:03,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397289492] [2020-10-28 15:07:03,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:03,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:07:03,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140016024] [2020-10-28 15:07:03,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:07:03,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:03,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:07:03,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:07:03,552 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 18 states. [2020-10-28 15:07:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:05,084 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-10-28 15:07:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:07:05,085 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-28 15:07:05,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:05,086 INFO L225 Difference]: With dead ends: 61 [2020-10-28 15:07:05,086 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 15:07:05,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 15:07:05,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 15:07:05,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2020-10-28 15:07:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 15:07:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-28 15:07:05,124 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 27 [2020-10-28 15:07:05,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:05,124 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-28 15:07:05,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:07:05,124 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-28 15:07:05,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:07:05,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:05,125 INFO L422 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:05,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-28 15:07:05,125 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:05,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1337436808, now seen corresponding path program 45 times [2020-10-28 15:07:05,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:05,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175548378] [2020-10-28 15:07:05,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:05,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:05,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:05,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:07:05,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:05,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-28 15:07:05,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:05,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:05,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:07:05,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:05,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:07:05,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:05,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:05,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:05,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:05,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:05,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:05,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:05,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:05,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:05,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:05,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:05,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:05,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:05,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175548378] [2020-10-28 15:07:05,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:05,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:07:05,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2918857] [2020-10-28 15:07:05,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:07:05,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:05,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:07:05,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:07:05,893 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 18 states. [2020-10-28 15:07:07,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:07,637 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-10-28 15:07:07,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:07:07,638 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-28 15:07:07,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:07,638 INFO L225 Difference]: With dead ends: 67 [2020-10-28 15:07:07,638 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 15:07:07,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 15:07:07,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 15:07:07,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2020-10-28 15:07:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 15:07:07,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-28 15:07:07,680 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 27 [2020-10-28 15:07:07,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:07,680 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-28 15:07:07,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:07:07,680 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-28 15:07:07,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:07:07,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:07,680 INFO L422 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:07,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-28 15:07:07,680 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:07,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1261030057, now seen corresponding path program 46 times [2020-10-28 15:07:07,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:07,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938850737] [2020-10-28 15:07:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:07,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:07,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:07,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:07:07,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:07,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-28 15:07:07,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:07,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:07,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:07:07,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:07,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:07:07,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:08,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:08,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:08,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:08,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:08,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:08,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:08,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:08,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:08,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:08,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:08,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:08,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:08,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938850737] [2020-10-28 15:07:08,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:08,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:07:08,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657461556] [2020-10-28 15:07:08,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:07:08,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:08,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:07:08,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:07:08,349 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 18 states. [2020-10-28 15:07:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:10,059 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-10-28 15:07:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:07:10,060 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-28 15:07:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:10,061 INFO L225 Difference]: With dead ends: 72 [2020-10-28 15:07:10,061 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 15:07:10,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:07:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 15:07:10,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2020-10-28 15:07:10,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 15:07:10,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-28 15:07:10,113 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 27 [2020-10-28 15:07:10,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:10,113 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-28 15:07:10,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:07:10,113 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-28 15:07:10,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:07:10,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:10,114 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:10,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-28 15:07:10,114 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:10,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:10,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2066570648, now seen corresponding path program 47 times [2020-10-28 15:07:10,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:10,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109688076] [2020-10-28 15:07:10,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:10,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:10,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:10,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:07:10,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:10,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-28 15:07:10,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:10,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:10,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:07:10,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:10,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:07:10,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:10,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:10,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:10,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:10,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:10,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:10,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:10,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:10,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:10,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:10,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:10,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:10,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:10,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109688076] [2020-10-28 15:07:10,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:10,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:07:10,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259939385] [2020-10-28 15:07:10,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:07:10,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:10,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:07:10,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:07:10,781 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 18 states. [2020-10-28 15:07:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:12,414 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-28 15:07:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:07:12,415 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-28 15:07:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:12,416 INFO L225 Difference]: With dead ends: 76 [2020-10-28 15:07:12,416 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 15:07:12,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 15:07:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 15:07:12,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2020-10-28 15:07:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 15:07:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-28 15:07:12,460 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 27 [2020-10-28 15:07:12,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:12,461 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-28 15:07:12,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:07:12,461 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-28 15:07:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:07:12,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:12,461 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:12,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-28 15:07:12,462 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:12,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:12,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1289770697, now seen corresponding path program 48 times [2020-10-28 15:07:12,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:12,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438748667] [2020-10-28 15:07:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:12,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:12,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:12,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:07:12,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:12,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-28 15:07:12,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:12,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:12,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:07:12,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:12,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:07:12,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:13,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:13,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:13,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:13,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:13,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:13,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:13,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:13,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:13,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:13,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:13,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:13,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:13,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438748667] [2020-10-28 15:07:13,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:13,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:07:13,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141463513] [2020-10-28 15:07:13,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:07:13,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:13,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:07:13,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:07:13,216 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 18 states. [2020-10-28 15:07:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:14,756 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-10-28 15:07:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:07:14,756 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-28 15:07:14,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:14,757 INFO L225 Difference]: With dead ends: 79 [2020-10-28 15:07:14,757 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 15:07:14,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 15:07:14,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 15:07:14,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2020-10-28 15:07:14,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 15:07:14,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-28 15:07:14,802 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 27 [2020-10-28 15:07:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:14,802 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-28 15:07:14,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:07:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-28 15:07:14,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:07:14,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:14,802 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:14,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-28 15:07:14,803 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:14,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:14,803 INFO L82 PathProgramCache]: Analyzing trace with hash 705303112, now seen corresponding path program 13 times [2020-10-28 15:07:14,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:14,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862580792] [2020-10-28 15:07:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:14,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:15,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:07:15,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:15,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-28 15:07:15,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:15,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:15,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:07:15,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:15,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:07:15,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:15,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:15,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:15,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:15,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:15,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:15,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:15,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:15,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:15,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:15,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:15,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:15,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862580792] [2020-10-28 15:07:15,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:15,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:07:15,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57464365] [2020-10-28 15:07:15,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:07:15,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:15,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:07:15,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:07:15,554 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 18 states. [2020-10-28 15:07:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:17,141 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2020-10-28 15:07:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:07:17,142 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-28 15:07:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:17,143 INFO L225 Difference]: With dead ends: 84 [2020-10-28 15:07:17,143 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 15:07:17,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:07:17,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 15:07:17,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2020-10-28 15:07:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 15:07:17,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-28 15:07:17,183 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 27 [2020-10-28 15:07:17,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:17,183 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-28 15:07:17,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:07:17,183 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-28 15:07:17,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:07:17,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:17,184 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:17,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-28 15:07:17,184 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:17,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:17,184 INFO L82 PathProgramCache]: Analyzing trace with hash -106499907, now seen corresponding path program 49 times [2020-10-28 15:07:17,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:17,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334782495] [2020-10-28 15:07:17,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:17,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:17,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:17,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:07:17,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:17,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-28 15:07:17,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:17,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:17,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:07:17,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:17,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:07:17,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:17,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:17,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:17,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:17,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:17,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:17,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 15:07:17,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:17,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:17,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:17,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:17,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:17,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:17,966 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 15:07:17,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334782495] [2020-10-28 15:07:17,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:17,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:07:17,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582312432] [2020-10-28 15:07:17,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:07:17,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:17,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:07:17,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:07:17,968 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 14 states. [2020-10-28 15:07:18,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:18,794 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-28 15:07:18,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:07:18,797 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-28 15:07:18,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:18,798 INFO L225 Difference]: With dead ends: 56 [2020-10-28 15:07:18,798 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 15:07:18,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:07:18,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 15:07:18,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-10-28 15:07:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:07:18,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-28 15:07:18,871 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 28 [2020-10-28 15:07:18,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:18,871 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-28 15:07:18,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:07:18,872 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-28 15:07:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:07:18,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:18,872 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:18,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-28 15:07:18,872 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:18,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:18,873 INFO L82 PathProgramCache]: Analyzing trace with hash -7352068, now seen corresponding path program 50 times [2020-10-28 15:07:18,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:18,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376449943] [2020-10-28 15:07:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:18,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:19,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:19,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:07:19,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:19,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 458 [2020-10-28 15:07:19,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:19,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:19,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:07:19,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:19,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:07:19,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:19,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:19,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:19,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:19,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:19,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:19,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:19,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:19,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:19,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:19,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:19,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:19,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:19,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376449943] [2020-10-28 15:07:19,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:19,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:07:19,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368292744] [2020-10-28 15:07:19,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:07:19,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:19,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:07:19,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:07:19,735 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 19 states. [2020-10-28 15:07:21,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:21,533 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-28 15:07:21,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:07:21,534 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-28 15:07:21,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:21,535 INFO L225 Difference]: With dead ends: 66 [2020-10-28 15:07:21,535 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 15:07:21,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:07:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 15:07:21,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-28 15:07:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:07:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-28 15:07:21,583 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 28 [2020-10-28 15:07:21,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:21,584 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-28 15:07:21,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:07:21,584 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-28 15:07:21,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:07:21,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:21,584 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:21,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-28 15:07:21,585 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:21,585 INFO L82 PathProgramCache]: Analyzing trace with hash -419795747, now seen corresponding path program 51 times [2020-10-28 15:07:21,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:21,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537660291] [2020-10-28 15:07:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:21,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:22,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:07:22,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:22,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-28 15:07:22,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:22,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:22,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:07:22,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:22,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:07:22,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:22,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:22,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:22,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:22,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:22,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:22,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:22,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:22,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:22,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:22,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:22,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:22,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537660291] [2020-10-28 15:07:22,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:22,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:07:22,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896586939] [2020-10-28 15:07:22,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:07:22,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:22,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:07:22,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:07:22,429 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 19 states. [2020-10-28 15:07:24,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:24,522 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-28 15:07:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:07:24,523 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-28 15:07:24,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:24,524 INFO L225 Difference]: With dead ends: 73 [2020-10-28 15:07:24,524 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 15:07:24,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 15:07:24,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 15:07:24,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 44. [2020-10-28 15:07:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:07:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-28 15:07:24,575 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 28 [2020-10-28 15:07:24,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:24,575 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-28 15:07:24,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:07:24,575 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-28 15:07:24,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:07:24,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:24,576 INFO L422 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:24,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-28 15:07:24,576 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:24,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:24,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1506562268, now seen corresponding path program 52 times [2020-10-28 15:07:24,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:24,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200882119] [2020-10-28 15:07:24,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:24,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:24,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:24,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:07:24,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:24,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-28 15:07:24,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:24,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:24,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:07:24,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:24,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:07:24,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:25,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:25,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:25,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:25,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:25,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:25,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:25,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:25,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:25,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:25,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:25,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:25,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:25,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200882119] [2020-10-28 15:07:25,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:25,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:07:25,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343728941] [2020-10-28 15:07:25,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:07:25,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:25,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:07:25,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:07:25,323 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 19 states. [2020-10-28 15:07:27,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:27,408 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-10-28 15:07:27,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:07:27,409 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-28 15:07:27,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:27,410 INFO L225 Difference]: With dead ends: 79 [2020-10-28 15:07:27,410 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 15:07:27,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=187, Invalid=1705, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 15:07:27,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 15:07:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 44. [2020-10-28 15:07:27,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:07:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-28 15:07:27,479 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 28 [2020-10-28 15:07:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:27,479 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-28 15:07:27,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:07:27,479 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-28 15:07:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:07:27,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:27,480 INFO L422 BasicCegarLoop]: trace histogram [11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:27,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-28 15:07:27,480 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:27,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:27,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1430155517, now seen corresponding path program 53 times [2020-10-28 15:07:27,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:27,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214122420] [2020-10-28 15:07:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:27,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:27,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:27,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:07:27,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:27,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-28 15:07:27,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:27,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:27,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:07:27,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:27,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:07:27,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:28,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:28,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:28,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:28,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:28,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:28,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:28,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:28,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:28,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:28,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:28,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:28,336 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 15:07:28,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214122420] [2020-10-28 15:07:28,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:28,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:07:28,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245105134] [2020-10-28 15:07:28,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:07:28,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:28,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:07:28,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:07:28,338 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 19 states. [2020-10-28 15:07:30,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:30,390 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-10-28 15:07:30,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:07:30,390 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-28 15:07:30,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:30,392 INFO L225 Difference]: With dead ends: 84 [2020-10-28 15:07:30,392 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 15:07:30,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:07:30,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 15:07:30,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 44. [2020-10-28 15:07:30,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:07:30,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-28 15:07:30,445 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 28 [2020-10-28 15:07:30,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:30,445 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-28 15:07:30,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:07:30,445 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-28 15:07:30,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:07:30,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:30,445 INFO L422 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:30,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-28 15:07:30,446 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:30,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:30,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1897445188, now seen corresponding path program 54 times [2020-10-28 15:07:30,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:30,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966084358] [2020-10-28 15:07:30,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:30,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:30,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:07:30,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:30,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-28 15:07:30,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:30,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:30,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:07:30,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:30,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:07:30,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:31,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:31,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:31,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:31,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:31,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:31,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:31,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:31,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:31,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:31,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966084358] [2020-10-28 15:07:31,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:31,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:07:31,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690743735] [2020-10-28 15:07:31,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:07:31,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:31,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:07:31,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:07:31,181 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 19 states. [2020-10-28 15:07:33,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:33,050 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-28 15:07:33,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:07:33,051 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-28 15:07:33,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:33,052 INFO L225 Difference]: With dead ends: 88 [2020-10-28 15:07:33,052 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 15:07:33,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=131, Invalid=1275, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 15:07:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 15:07:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 44. [2020-10-28 15:07:33,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:07:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-28 15:07:33,104 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 28 [2020-10-28 15:07:33,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:33,104 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-28 15:07:33,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:07:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-28 15:07:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:07:33,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:33,104 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:33,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-28 15:07:33,105 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:33,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1458896157, now seen corresponding path program 55 times [2020-10-28 15:07:33,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:33,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203051140] [2020-10-28 15:07:33,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:33,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:33,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:33,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:07:33,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:33,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-10-28 15:07:33,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:33,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:33,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:07:33,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:33,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:07:33,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:33,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:33,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:33,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:33,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:33,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:33,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:33,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:33,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:33,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:33,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:33,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:33,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:33,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203051140] [2020-10-28 15:07:33,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:33,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:07:33,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3737515] [2020-10-28 15:07:33,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:07:33,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:33,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:07:33,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:07:33,880 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 19 states. [2020-10-28 15:07:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:35,754 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-10-28 15:07:35,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:07:35,755 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-28 15:07:35,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:35,756 INFO L225 Difference]: With dead ends: 91 [2020-10-28 15:07:35,756 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 15:07:35,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 15:07:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 15:07:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 44. [2020-10-28 15:07:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:07:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-28 15:07:35,830 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 28 [2020-10-28 15:07:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:35,831 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-28 15:07:35,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:07:35,831 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-28 15:07:35,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:07:35,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:35,831 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:35,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-28 15:07:35,831 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:35,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:35,832 INFO L82 PathProgramCache]: Analyzing trace with hash 874428572, now seen corresponding path program 14 times [2020-10-28 15:07:35,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:35,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058168639] [2020-10-28 15:07:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:35,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:36,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:36,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:07:36,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:36,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-10-28 15:07:36,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:36,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:36,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:07:36,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:36,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:07:36,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:36,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:36,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:36,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:36,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:36,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:36,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:36,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:36,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:36,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:36,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058168639] [2020-10-28 15:07:36,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:36,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:07:36,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948729786] [2020-10-28 15:07:36,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:07:36,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:36,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:07:36,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:07:36,579 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 19 states. [2020-10-28 15:07:38,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:38,447 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2020-10-28 15:07:38,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:07:38,448 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-28 15:07:38,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:38,449 INFO L225 Difference]: With dead ends: 96 [2020-10-28 15:07:38,449 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 15:07:38,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:07:38,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 15:07:38,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2020-10-28 15:07:38,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 15:07:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-28 15:07:38,515 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 28 [2020-10-28 15:07:38,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:38,515 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-28 15:07:38,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:07:38,516 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-28 15:07:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:07:38,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:38,516 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:38,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-28 15:07:38,516 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:38,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:38,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2062806344, now seen corresponding path program 56 times [2020-10-28 15:07:38,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:38,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419633307] [2020-10-28 15:07:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:38,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:38,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:38,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:07:38,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:38,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-28 15:07:38,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:38,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:38,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:07:38,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:38,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:07:38,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:39,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:39,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:39,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:39,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:39,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:39,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:39,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:39,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:39,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:39,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:39,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:39,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:39,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419633307] [2020-10-28 15:07:39,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:39,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:07:39,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055495586] [2020-10-28 15:07:39,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:07:39,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:39,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:07:39,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:07:39,344 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 19 states. [2020-10-28 15:07:40,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:40,679 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-28 15:07:40,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:07:40,680 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2020-10-28 15:07:40,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:40,680 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:07:40,680 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 15:07:40,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:07:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 15:07:40,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-28 15:07:40,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:07:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-28 15:07:40,728 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 29 [2020-10-28 15:07:40,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:40,728 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-28 15:07:40,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:07:40,728 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-28 15:07:40,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:07:40,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:40,729 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:40,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-28 15:07:40,729 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:40,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:40,729 INFO L82 PathProgramCache]: Analyzing trace with hash 841422057, now seen corresponding path program 57 times [2020-10-28 15:07:40,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:40,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714093837] [2020-10-28 15:07:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:40,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:41,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:41,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:07:41,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:41,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-28 15:07:41,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:41,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:41,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:07:41,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:41,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:07:41,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:41,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:41,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:41,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:41,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:41,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:41,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:41,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:41,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:41,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:41,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:41,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:41,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:41,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714093837] [2020-10-28 15:07:41,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:41,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:07:41,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913333313] [2020-10-28 15:07:41,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:07:41,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:41,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:07:41,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:07:41,524 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 20 states. [2020-10-28 15:07:43,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:43,028 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2020-10-28 15:07:43,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:07:43,029 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-28 15:07:43,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:43,029 INFO L225 Difference]: With dead ends: 59 [2020-10-28 15:07:43,029 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 15:07:43,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:07:43,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 15:07:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2020-10-28 15:07:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 15:07:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-28 15:07:43,121 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 29 [2020-10-28 15:07:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:43,122 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-28 15:07:43,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:07:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-28 15:07:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:07:43,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:43,122 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:43,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-28 15:07:43,122 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:43,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:43,123 INFO L82 PathProgramCache]: Analyzing trace with hash 940569896, now seen corresponding path program 58 times [2020-10-28 15:07:43,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:43,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997489822] [2020-10-28 15:07:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:43,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:43,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:07:43,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:43,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-28 15:07:43,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:43,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:43,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:07:43,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:43,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:07:43,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:43,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:43,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:43,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:43,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:43,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:43,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:43,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:43,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:43,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:43,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:43,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:43,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997489822] [2020-10-28 15:07:43,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:43,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:07:43,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627140807] [2020-10-28 15:07:43,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:07:43,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:43,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:07:43,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:07:43,952 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 20 states. [2020-10-28 15:07:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:45,881 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-10-28 15:07:45,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:07:45,882 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-28 15:07:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:45,883 INFO L225 Difference]: With dead ends: 67 [2020-10-28 15:07:45,883 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 15:07:45,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:07:45,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 15:07:45,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2020-10-28 15:07:45,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 15:07:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-28 15:07:45,943 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 29 [2020-10-28 15:07:45,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:45,943 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-28 15:07:45,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:07:45,944 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-28 15:07:45,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:07:45,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:45,944 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:45,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-28 15:07:45,944 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:45,945 INFO L82 PathProgramCache]: Analyzing trace with hash 528126217, now seen corresponding path program 59 times [2020-10-28 15:07:45,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:45,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485009344] [2020-10-28 15:07:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:45,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:46,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:46,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:07:46,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:46,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-28 15:07:46,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:46,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:07:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:07:46,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:46,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:46,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:46,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:46,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:46,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:46,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:46,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:46,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:46,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:46,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:46,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:46,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:46,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:46,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485009344] [2020-10-28 15:07:46,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:46,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:07:46,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665584108] [2020-10-28 15:07:46,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:07:46,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:46,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:07:46,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:07:46,782 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 20 states. [2020-10-28 15:07:49,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:49,061 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-10-28 15:07:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 15:07:49,062 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-28 15:07:49,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:49,063 INFO L225 Difference]: With dead ends: 74 [2020-10-28 15:07:49,063 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 15:07:49,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 15:07:49,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 15:07:49,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-10-28 15:07:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 15:07:49,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-28 15:07:49,125 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 29 [2020-10-28 15:07:49,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:49,125 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-28 15:07:49,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:07:49,125 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-28 15:07:49,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:07:49,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:49,125 INFO L422 BasicCegarLoop]: trace histogram [11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:49,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-28 15:07:49,126 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:49,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1840483064, now seen corresponding path program 60 times [2020-10-28 15:07:49,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:49,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973550494] [2020-10-28 15:07:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:49,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:49,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:49,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:07:49,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:49,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-28 15:07:49,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:49,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:49,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:07:49,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:49,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:07:49,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:49,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:49,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:49,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:49,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:49,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:49,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:49,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:49,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:49,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:49,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:49,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:49,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:49,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973550494] [2020-10-28 15:07:49,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:49,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:07:49,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098822629] [2020-10-28 15:07:49,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:07:49,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:49,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:07:49,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:07:49,957 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 20 states. [2020-10-28 15:07:52,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:52,281 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2020-10-28 15:07:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 15:07:52,281 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-28 15:07:52,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:52,282 INFO L225 Difference]: With dead ends: 80 [2020-10-28 15:07:52,283 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 15:07:52,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 15:07:52,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 15:07:52,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 45. [2020-10-28 15:07:52,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 15:07:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-28 15:07:52,343 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 29 [2020-10-28 15:07:52,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:52,343 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-28 15:07:52,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:07:52,343 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-28 15:07:52,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:07:52,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:52,343 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:52,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-28 15:07:52,343 INFO L429 AbstractCegarLoop]: === Iteration 77 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:52,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:52,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1916889815, now seen corresponding path program 61 times [2020-10-28 15:07:52,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:52,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666763257] [2020-10-28 15:07:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:52,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:52,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:52,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:07:52,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:52,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-28 15:07:52,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:52,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:52,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:07:52,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:52,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:07:52,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:53,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:53,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:53,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:53,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:53,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:53,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:53,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:53,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:53,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:53,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:53,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:53,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:53,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666763257] [2020-10-28 15:07:53,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:53,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:07:53,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752494576] [2020-10-28 15:07:53,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:07:53,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:53,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:07:53,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:07:53,147 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 20 states. [2020-10-28 15:07:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:55,344 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-10-28 15:07:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:07:55,345 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-28 15:07:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:55,346 INFO L225 Difference]: With dead ends: 85 [2020-10-28 15:07:55,346 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 15:07:55,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=164, Invalid=1642, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:07:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 15:07:55,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 45. [2020-10-28 15:07:55,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 15:07:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-28 15:07:55,407 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 29 [2020-10-28 15:07:55,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:55,407 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-28 15:07:55,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:07:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-28 15:07:55,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:07:55,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:55,408 INFO L422 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:55,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-28 15:07:55,408 INFO L429 AbstractCegarLoop]: === Iteration 78 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:55,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:55,408 INFO L82 PathProgramCache]: Analyzing trace with hash -949523224, now seen corresponding path program 62 times [2020-10-28 15:07:55,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:55,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940054747] [2020-10-28 15:07:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:55,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:55,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:55,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:07:55,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:55,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-28 15:07:55,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:55,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:07:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:07:55,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:56,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:56,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:56,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:56,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:56,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:56,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:56,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:56,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:56,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:56,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:56,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:56,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:56,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940054747] [2020-10-28 15:07:56,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:56,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:07:56,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297798422] [2020-10-28 15:07:56,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:07:56,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:56,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:07:56,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:07:56,258 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 20 states. [2020-10-28 15:07:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:58,340 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2020-10-28 15:07:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:07:58,341 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-28 15:07:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:58,342 INFO L225 Difference]: With dead ends: 89 [2020-10-28 15:07:58,342 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 15:07:58,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 15:07:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 15:07:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 45. [2020-10-28 15:07:58,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 15:07:58,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-28 15:07:58,411 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 29 [2020-10-28 15:07:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:58,411 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-28 15:07:58,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:07:58,412 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-28 15:07:58,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:07:58,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:58,412 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:58,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-28 15:07:58,412 INFO L429 AbstractCegarLoop]: === Iteration 79 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:58,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1888149175, now seen corresponding path program 63 times [2020-10-28 15:07:58,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:58,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127328441] [2020-10-28 15:07:58,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:58,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:58,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:58,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:07:58,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:58,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-28 15:07:58,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:58,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:58,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:07:58,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:58,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:07:58,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:59,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:59,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:59,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:59,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:59,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:59,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:59,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:59,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:59,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:59,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:59,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:59,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:59,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127328441] [2020-10-28 15:07:59,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:59,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:07:59,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943508730] [2020-10-28 15:07:59,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:07:59,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:59,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:07:59,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:07:59,260 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 20 states. [2020-10-28 15:08:01,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:01,279 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-10-28 15:08:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:08:01,280 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-28 15:08:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:01,281 INFO L225 Difference]: With dead ends: 92 [2020-10-28 15:08:01,281 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 15:08:01,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 15:08:01,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 15:08:01,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 45. [2020-10-28 15:08:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 15:08:01,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-28 15:08:01,359 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 29 [2020-10-28 15:08:01,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:01,359 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-28 15:08:01,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:08:01,359 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-28 15:08:01,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:08:01,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:01,360 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:01,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-28 15:08:01,360 INFO L429 AbstractCegarLoop]: === Iteration 80 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:01,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:01,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1822350536, now seen corresponding path program 15 times [2020-10-28 15:08:01,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:01,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241012302] [2020-10-28 15:08:01,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:01,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:01,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:01,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:08:01,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:01,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-28 15:08:01,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:01,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:01,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:08:01,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:01,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:08:01,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:02,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:02,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:02,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:02,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:02,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:02,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:02,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:02,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:02,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:02,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:02,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:02,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:02,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241012302] [2020-10-28 15:08:02,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:02,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:08:02,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734581884] [2020-10-28 15:08:02,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:08:02,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:02,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:08:02,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:08:02,129 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 20 states. [2020-10-28 15:08:04,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:04,187 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2020-10-28 15:08:04,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:08:04,188 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-28 15:08:04,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:04,189 INFO L225 Difference]: With dead ends: 97 [2020-10-28 15:08:04,189 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 15:08:04,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:08:04,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 15:08:04,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 47. [2020-10-28 15:08:04,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 15:08:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-28 15:08:04,259 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 29 [2020-10-28 15:08:04,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:04,260 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-28 15:08:04,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:08:04,260 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-28 15:08:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:04,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:04,260 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:04,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-28 15:08:04,260 INFO L429 AbstractCegarLoop]: === Iteration 81 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:04,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:04,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1383616156, now seen corresponding path program 64 times [2020-10-28 15:08:04,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:04,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089934489] [2020-10-28 15:08:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:04,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:04,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:04,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:04,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:04,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-28 15:08:04,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:04,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:04,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:08:04,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:04,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 15:08:04,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:06,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:06,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:06,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:06,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:06,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:06,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:06,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:06,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:06,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:06,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:06,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:06,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:06,422 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 15:08:06,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089934489] [2020-10-28 15:08:06,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:06,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:08:06,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692495150] [2020-10-28 15:08:06,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:08:06,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:06,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:08:06,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:08:06,423 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 21 states. [2020-10-28 15:08:13,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:13,183 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-10-28 15:08:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:08:13,184 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-28 15:08:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:13,185 INFO L225 Difference]: With dead ends: 61 [2020-10-28 15:08:13,185 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 15:08:13,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=127, Invalid=1353, Unknown=2, NotChecked=0, Total=1482 [2020-10-28 15:08:13,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 15:08:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-10-28 15:08:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 15:08:13,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-28 15:08:13,290 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 30 [2020-10-28 15:08:13,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:13,291 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-28 15:08:13,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:08:13,291 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-28 15:08:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:13,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:13,291 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:13,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-28 15:08:13,291 INFO L429 AbstractCegarLoop]: === Iteration 82 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:13,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:13,292 INFO L82 PathProgramCache]: Analyzing trace with hash 162231869, now seen corresponding path program 65 times [2020-10-28 15:08:13,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:13,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566749021] [2020-10-28 15:08:13,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:13,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:13,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:13,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:13,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:13,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-28 15:08:13,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:13,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:08:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:13,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:08:13,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:14,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:14,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:14,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:14,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:14,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:14,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:14,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:14,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:14,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:14,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:14,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:14,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:14,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566749021] [2020-10-28 15:08:14,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:14,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:08:14,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320372845] [2020-10-28 15:08:14,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:08:14,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:14,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:08:14,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:08:14,221 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 21 states. [2020-10-28 15:08:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:16,566 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-10-28 15:08:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:08:16,567 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-28 15:08:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:16,568 INFO L225 Difference]: With dead ends: 72 [2020-10-28 15:08:16,568 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 15:08:16,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 15:08:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 15:08:16,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2020-10-28 15:08:16,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 15:08:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-28 15:08:16,646 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 30 [2020-10-28 15:08:16,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:16,646 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-28 15:08:16,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:08:16,646 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-28 15:08:16,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:16,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:16,646 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:16,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-28 15:08:16,646 INFO L429 AbstractCegarLoop]: === Iteration 83 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:16,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:16,647 INFO L82 PathProgramCache]: Analyzing trace with hash 261379708, now seen corresponding path program 66 times [2020-10-28 15:08:16,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:16,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268774405] [2020-10-28 15:08:16,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:16,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:17,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:17,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:17,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:17,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-10-28 15:08:17,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:17,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:17,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:08:17,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:17,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:08:17,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:17,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:17,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:17,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:17,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:17,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:17,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:17,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:17,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:17,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:17,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:17,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:17,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:17,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268774405] [2020-10-28 15:08:17,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:17,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:08:17,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382218928] [2020-10-28 15:08:17,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:08:17,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:17,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:08:17,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:08:17,685 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 21 states. [2020-10-28 15:08:20,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:20,440 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2020-10-28 15:08:20,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 15:08:20,444 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-28 15:08:20,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:20,444 INFO L225 Difference]: With dead ends: 80 [2020-10-28 15:08:20,445 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 15:08:20,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=227, Invalid=2223, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 15:08:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 15:08:20,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2020-10-28 15:08:20,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 15:08:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-28 15:08:20,524 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 30 [2020-10-28 15:08:20,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:20,524 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-28 15:08:20,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:08:20,524 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-28 15:08:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:20,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:20,525 INFO L422 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:20,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-28 15:08:20,525 INFO L429 AbstractCegarLoop]: === Iteration 84 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:20,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:20,525 INFO L82 PathProgramCache]: Analyzing trace with hash -151063971, now seen corresponding path program 67 times [2020-10-28 15:08:20,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:20,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541915282] [2020-10-28 15:08:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:20,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:21,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:21,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:21,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:21,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-28 15:08:21,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:21,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:21,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:08:21,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:21,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:08:21,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:21,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:21,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:21,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:21,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:21,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:21,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:21,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:21,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:21,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:21,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:21,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:21,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:21,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541915282] [2020-10-28 15:08:21,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:21,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:08:21,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207009288] [2020-10-28 15:08:21,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:08:21,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:21,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:08:21,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:08:21,580 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 21 states. [2020-10-28 15:08:24,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:24,641 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2020-10-28 15:08:24,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 15:08:24,642 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-28 15:08:24,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:24,643 INFO L225 Difference]: With dead ends: 87 [2020-10-28 15:08:24,643 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 15:08:24,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=228, Invalid=2322, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 15:08:24,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 15:08:24,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2020-10-28 15:08:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 15:08:24,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-28 15:08:24,732 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 30 [2020-10-28 15:08:24,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:24,732 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-28 15:08:24,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:08:24,732 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-28 15:08:24,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:24,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:24,733 INFO L422 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:24,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-28 15:08:24,733 INFO L429 AbstractCegarLoop]: === Iteration 85 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:24,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:24,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1775294044, now seen corresponding path program 68 times [2020-10-28 15:08:24,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:24,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886768814] [2020-10-28 15:08:24,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:24,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:25,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:25,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:25,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:25,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 727 [2020-10-28 15:08:25,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:25,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:25,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:08:25,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:25,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:08:25,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:26,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:26,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:26,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:26,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:26,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:26,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:26,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:26,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:26,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:26,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:26,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:26,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:26,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886768814] [2020-10-28 15:08:26,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:26,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:08:26,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196747961] [2020-10-28 15:08:26,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:08:26,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:26,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:08:26,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:08:26,026 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 21 states. [2020-10-28 15:08:28,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:28,918 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2020-10-28 15:08:28,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 15:08:28,918 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-28 15:08:28,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:28,919 INFO L225 Difference]: With dead ends: 93 [2020-10-28 15:08:28,920 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 15:08:28,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 15:08:28,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 15:08:29,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 48. [2020-10-28 15:08:29,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 15:08:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-28 15:08:29,002 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 30 [2020-10-28 15:08:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:29,003 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-28 15:08:29,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:08:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-28 15:08:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:29,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:29,003 INFO L422 BasicCegarLoop]: trace histogram [13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:29,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-10-28 15:08:29,004 INFO L429 AbstractCegarLoop]: === Iteration 86 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:29,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1698887293, now seen corresponding path program 69 times [2020-10-28 15:08:29,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:29,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868414008] [2020-10-28 15:08:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:29,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:29,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:29,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:29,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:29,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-28 15:08:29,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:29,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:29,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:08:29,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:29,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:08:29,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:30,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:30,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:30,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:30,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:30,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:30,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:30,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:30,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:30,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:30,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868414008] [2020-10-28 15:08:30,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:30,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:08:30,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329102811] [2020-10-28 15:08:30,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:08:30,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:30,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:08:30,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:08:30,039 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 21 states. [2020-10-28 15:08:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:32,747 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2020-10-28 15:08:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 15:08:32,748 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-28 15:08:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:32,750 INFO L225 Difference]: With dead ends: 98 [2020-10-28 15:08:32,750 INFO L226 Difference]: Without dead ends: 92 [2020-10-28 15:08:32,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=170, Invalid=1810, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:08:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-28 15:08:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 48. [2020-10-28 15:08:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 15:08:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-28 15:08:32,835 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 30 [2020-10-28 15:08:32,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:32,835 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-28 15:08:32,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:08:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-28 15:08:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:32,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:32,836 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:32,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-10-28 15:08:32,836 INFO L429 AbstractCegarLoop]: === Iteration 87 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:32,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:32,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1628713412, now seen corresponding path program 70 times [2020-10-28 15:08:32,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:32,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847412279] [2020-10-28 15:08:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:32,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:33,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:33,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:33,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:33,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-28 15:08:33,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:33,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:33,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:08:33,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:33,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:08:33,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:33,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:33,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:33,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:33,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:33,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:33,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:33,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:33,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:33,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:33,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:33,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:33,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:33,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847412279] [2020-10-28 15:08:33,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:33,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:08:33,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419349241] [2020-10-28 15:08:33,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:08:33,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:33,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:08:33,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:08:33,846 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 21 states. [2020-10-28 15:08:36,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:36,425 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2020-10-28 15:08:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:08:36,426 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-28 15:08:36,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:36,427 INFO L225 Difference]: With dead ends: 102 [2020-10-28 15:08:36,428 INFO L226 Difference]: Without dead ends: 96 [2020-10-28 15:08:36,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=143, Invalid=1579, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 15:08:36,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-28 15:08:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 48. [2020-10-28 15:08:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 15:08:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-28 15:08:36,513 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 30 [2020-10-28 15:08:36,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:36,514 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-28 15:08:36,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:08:36,514 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-28 15:08:36,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:36,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:36,514 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:36,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-10-28 15:08:36,514 INFO L429 AbstractCegarLoop]: === Iteration 88 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:36,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:36,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1727627933, now seen corresponding path program 71 times [2020-10-28 15:08:36,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:36,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340633149] [2020-10-28 15:08:36,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:36,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:36,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:36,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:36,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:36,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-28 15:08:36,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:36,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:08:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:36,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:08:36,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:37,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:37,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:37,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:37,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:37,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:37,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:37,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:37,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:37,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:37,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:37,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:37,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:37,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340633149] [2020-10-28 15:08:37,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:37,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:08:37,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28161943] [2020-10-28 15:08:37,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:08:37,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:37,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:08:37,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:08:37,509 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 21 states. [2020-10-28 15:08:40,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:40,069 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2020-10-28 15:08:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:08:40,070 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-28 15:08:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:40,071 INFO L225 Difference]: With dead ends: 105 [2020-10-28 15:08:40,071 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 15:08:40,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=124, Invalid=1436, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 15:08:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 15:08:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 48. [2020-10-28 15:08:40,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 15:08:40,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-28 15:08:40,164 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 30 [2020-10-28 15:08:40,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:40,164 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-28 15:08:40,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:08:40,165 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-28 15:08:40,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:40,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:40,165 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:40,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-10-28 15:08:40,165 INFO L429 AbstractCegarLoop]: === Iteration 89 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:40,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:40,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1143160348, now seen corresponding path program 16 times [2020-10-28 15:08:40,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:40,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290600800] [2020-10-28 15:08:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:40,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:40,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:40,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:40,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:40,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 458 [2020-10-28 15:08:40,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:40,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:40,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:08:40,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:40,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:08:40,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:41,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:41,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:41,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:41,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:41,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:41,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:41,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:41,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:41,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:41,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:41,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:41,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:41,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290600800] [2020-10-28 15:08:41,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:41,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:08:41,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087493219] [2020-10-28 15:08:41,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:08:41,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:41,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:08:41,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:08:41,158 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 21 states. [2020-10-28 15:08:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:43,804 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2020-10-28 15:08:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:08:43,805 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-28 15:08:43,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:43,806 INFO L225 Difference]: With dead ends: 110 [2020-10-28 15:08:43,806 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 15:08:43,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:08:43,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 15:08:43,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 50. [2020-10-28 15:08:43,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 15:08:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-28 15:08:43,901 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2020-10-28 15:08:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:43,901 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-28 15:08:43,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:08:43,902 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-28 15:08:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:08:43,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:43,902 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:43,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-10-28 15:08:43,902 INFO L429 AbstractCegarLoop]: === Iteration 90 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:43,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:43,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1011764041, now seen corresponding path program 72 times [2020-10-28 15:08:43,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:43,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890107022] [2020-10-28 15:08:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:43,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:44,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:44,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:08:44,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:44,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-28 15:08:44,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:44,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:44,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:08:44,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:44,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:08:44,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:44,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:44,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:44,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:44,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:44,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:44,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:44,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:44,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:44,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:44,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:44,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:44,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:44,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890107022] [2020-10-28 15:08:44,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:44,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:08:44,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277460088] [2020-10-28 15:08:44,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:08:44,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:44,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:08:44,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:08:44,930 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 21 states. [2020-10-28 15:08:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:46,732 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-10-28 15:08:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:08:46,733 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 31 [2020-10-28 15:08:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:46,734 INFO L225 Difference]: With dead ends: 65 [2020-10-28 15:08:46,734 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 15:08:46,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:08:46,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 15:08:46,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-28 15:08:46,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 15:08:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-28 15:08:46,814 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 31 [2020-10-28 15:08:46,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:46,814 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-28 15:08:46,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:08:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-28 15:08:46,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:08:46,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:46,814 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:46,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-10-28 15:08:46,815 INFO L429 AbstractCegarLoop]: === Iteration 91 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:46,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:46,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1803556808, now seen corresponding path program 73 times [2020-10-28 15:08:46,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:46,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280455308] [2020-10-28 15:08:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:46,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:47,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:47,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:08:47,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:47,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-28 15:08:47,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:47,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:47,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:08:47,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:47,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:08:47,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:47,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:47,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:47,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:47,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:47,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:47,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:47,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:47,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:47,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:47,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:47,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:47,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:47,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280455308] [2020-10-28 15:08:47,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:47,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:08:47,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694442317] [2020-10-28 15:08:47,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:08:47,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:47,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:08:47,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:08:47,978 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 22 states. [2020-10-28 15:08:49,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:49,769 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-28 15:08:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:08:49,770 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-28 15:08:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:49,770 INFO L225 Difference]: With dead ends: 64 [2020-10-28 15:08:49,771 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 15:08:49,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:08:49,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 15:08:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-10-28 15:08:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 15:08:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-28 15:08:49,864 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-28 15:08:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:49,864 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-28 15:08:49,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:08:49,864 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-28 15:08:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:08:49,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:49,865 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:49,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2020-10-28 15:08:49,865 INFO L429 AbstractCegarLoop]: === Iteration 92 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:49,865 INFO L82 PathProgramCache]: Analyzing trace with hash 582172521, now seen corresponding path program 74 times [2020-10-28 15:08:49,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:49,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794900223] [2020-10-28 15:08:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:49,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:50,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:50,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:08:50,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:50,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 520 [2020-10-28 15:08:50,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:50,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:50,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:08:50,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:50,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:08:50,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:50,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:51,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:51,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:51,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:51,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:51,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:51,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:51,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:51,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:51,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:51,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:51,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:51,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794900223] [2020-10-28 15:08:51,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:51,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:08:51,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504157526] [2020-10-28 15:08:51,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:08:51,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:51,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:08:51,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:08:51,009 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 22 states. [2020-10-28 15:08:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:53,641 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-28 15:08:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 15:08:53,642 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-28 15:08:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:53,643 INFO L225 Difference]: With dead ends: 73 [2020-10-28 15:08:53,643 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 15:08:53,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 15:08:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 15:08:53,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2020-10-28 15:08:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 15:08:53,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-28 15:08:53,742 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-28 15:08:53,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:53,742 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-28 15:08:53,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:08:53,742 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-28 15:08:53,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:08:53,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:53,743 INFO L422 BasicCegarLoop]: trace histogram [11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:53,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2020-10-28 15:08:53,743 INFO L429 AbstractCegarLoop]: === Iteration 93 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:53,743 INFO L82 PathProgramCache]: Analyzing trace with hash 681320360, now seen corresponding path program 75 times [2020-10-28 15:08:53,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:53,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662556450] [2020-10-28 15:08:53,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:53,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:54,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:54,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:08:54,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:54,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-28 15:08:54,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:54,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:54,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:08:54,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:54,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:08:54,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:54,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:54,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:54,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:54,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:54,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:54,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:54,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:54,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:54,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:54,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:54,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:54,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:54,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662556450] [2020-10-28 15:08:54,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:54,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:08:54,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014481152] [2020-10-28 15:08:54,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:08:54,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:54,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:08:54,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:08:54,900 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 22 states. [2020-10-28 15:08:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:57,974 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-28 15:08:57,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 15:08:57,975 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-28 15:08:57,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:57,976 INFO L225 Difference]: With dead ends: 81 [2020-10-28 15:08:57,976 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 15:08:57,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=233, Invalid=2419, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 15:08:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 15:08:58,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 49. [2020-10-28 15:08:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 15:08:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-28 15:08:58,080 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-28 15:08:58,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:58,080 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-28 15:08:58,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:08:58,080 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-28 15:08:58,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:08:58,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:58,080 INFO L422 BasicCegarLoop]: trace histogram [12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:58,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2020-10-28 15:08:58,081 INFO L429 AbstractCegarLoop]: === Iteration 94 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:58,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:58,081 INFO L82 PathProgramCache]: Analyzing trace with hash 268876681, now seen corresponding path program 76 times [2020-10-28 15:08:58,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:58,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973519901] [2020-10-28 15:08:58,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:58,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:58,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:58,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:08:58,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:58,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-28 15:08:58,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:58,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:58,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:08:58,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:58,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:08:58,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:59,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:59,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:59,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:59,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:59,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:59,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:59,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:59,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:59,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:59,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:59,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:59,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:59,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973519901] [2020-10-28 15:08:59,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:59,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:08:59,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599845071] [2020-10-28 15:08:59,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:08:59,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:59,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:08:59,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:08:59,278 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 22 states. [2020-10-28 15:09:02,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:02,539 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2020-10-28 15:09:02,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 15:09:02,540 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-28 15:09:02,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:02,541 INFO L225 Difference]: With dead ends: 88 [2020-10-28 15:09:02,541 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 15:09:02,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=234, Invalid=2522, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 15:09:02,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 15:09:02,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 49. [2020-10-28 15:09:02,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 15:09:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-28 15:09:02,727 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-28 15:09:02,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:02,727 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-28 15:09:02,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:09:02,727 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-28 15:09:02,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:09:02,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:02,728 INFO L422 BasicCegarLoop]: trace histogram [13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:02,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2020-10-28 15:09:02,728 INFO L429 AbstractCegarLoop]: === Iteration 95 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:02,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:02,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2099732600, now seen corresponding path program 77 times [2020-10-28 15:09:02,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:02,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069961747] [2020-10-28 15:09:02,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:02,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:03,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:03,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:09:03,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:03,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-28 15:09:03,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:03,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:03,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:09:03,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:03,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:09:03,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:03,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:03,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:03,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:03,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:03,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:03,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:03,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:03,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:03,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:03,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:03,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:03,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:09:03,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069961747] [2020-10-28 15:09:03,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:03,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:09:03,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177408031] [2020-10-28 15:09:03,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:09:03,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:03,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:09:03,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:09:03,970 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 22 states. [2020-10-28 15:09:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:07,151 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2020-10-28 15:09:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 15:09:07,152 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-28 15:09:07,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:07,153 INFO L225 Difference]: With dead ends: 94 [2020-10-28 15:09:07,153 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 15:09:07,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=211, Invalid=2339, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 15:09:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 15:09:07,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 49. [2020-10-28 15:09:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 15:09:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-28 15:09:07,253 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-28 15:09:07,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:07,254 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-28 15:09:07,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:09:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-28 15:09:07,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:09:07,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:07,254 INFO L422 BasicCegarLoop]: trace histogram [14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:07,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2020-10-28 15:09:07,254 INFO L429 AbstractCegarLoop]: === Iteration 96 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:07,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:07,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2118827945, now seen corresponding path program 78 times [2020-10-28 15:09:07,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:07,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528334611] [2020-10-28 15:09:07,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:07,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:07,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:07,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:09:07,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:07,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-28 15:09:07,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:07,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:07,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:09:07,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:07,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:09:07,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:08,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:08,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:08,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:08,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:08,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:08,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:08,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:08,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:08,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:08,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:08,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:08,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:09:08,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528334611] [2020-10-28 15:09:08,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:08,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:09:08,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797608239] [2020-10-28 15:09:08,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:09:08,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:08,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:09:08,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:09:08,393 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 22 states. [2020-10-28 15:09:11,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:11,449 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2020-10-28 15:09:11,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:09:11,450 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-28 15:09:11,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:11,451 INFO L225 Difference]: With dead ends: 99 [2020-10-28 15:09:11,451 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 15:09:11,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=176, Invalid=1986, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 15:09:11,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 15:09:11,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 49. [2020-10-28 15:09:11,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 15:09:11,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-28 15:09:11,556 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-28 15:09:11,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:11,557 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-28 15:09:11,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:09:11,557 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-28 15:09:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:09:11,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:11,557 INFO L422 BasicCegarLoop]: trace histogram [15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:11,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2020-10-28 15:09:11,557 INFO L429 AbstractCegarLoop]: === Iteration 97 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:11,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:11,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1208772760, now seen corresponding path program 79 times [2020-10-28 15:09:11,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:11,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989740182] [2020-10-28 15:09:11,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:11,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:12,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:12,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:09:12,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:12,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 528 [2020-10-28 15:09:12,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:12,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:12,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:09:12,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:12,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:09:12,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:12,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:12,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:12,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:12,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:12,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:12,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:12,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:12,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:12,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:12,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:12,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:12,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:09:12,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989740182] [2020-10-28 15:09:12,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:12,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:09:12,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619380591] [2020-10-28 15:09:12,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:09:12,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:12,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:09:12,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:09:12,712 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 22 states. [2020-10-28 15:09:15,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:15,526 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2020-10-28 15:09:15,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:09:15,527 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-28 15:09:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:15,528 INFO L225 Difference]: With dead ends: 103 [2020-10-28 15:09:15,528 INFO L226 Difference]: Without dead ends: 97 [2020-10-28 15:09:15,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=149, Invalid=1743, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 15:09:15,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-28 15:09:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 49. [2020-10-28 15:09:15,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 15:09:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-28 15:09:15,663 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-28 15:09:15,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:15,663 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-28 15:09:15,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:09:15,663 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-28 15:09:15,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:09:15,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:15,664 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:15,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2020-10-28 15:09:15,664 INFO L429 AbstractCegarLoop]: === Iteration 98 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:15,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:15,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2147398711, now seen corresponding path program 80 times [2020-10-28 15:09:15,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:15,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531959829] [2020-10-28 15:09:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:15,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:16,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:16,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:09:16,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:16,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 585 [2020-10-28 15:09:16,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:16,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:16,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:09:16,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:16,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:09:16,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:16,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:16,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:16,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:16,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:16,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:16,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:16,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:16,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:16,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:16,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:16,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:16,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:09:16,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531959829] [2020-10-28 15:09:16,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:16,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:09:16,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843353420] [2020-10-28 15:09:16,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:09:16,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:16,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:09:16,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:09:16,887 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 22 states. [2020-10-28 15:09:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:19,698 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2020-10-28 15:09:19,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:09:19,699 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-28 15:09:19,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:19,700 INFO L225 Difference]: With dead ends: 106 [2020-10-28 15:09:19,700 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 15:09:19,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=130, Invalid=1592, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 15:09:19,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 15:09:19,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 49. [2020-10-28 15:09:19,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 15:09:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-28 15:09:19,813 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-28 15:09:19,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:19,813 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-28 15:09:19,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:09:19,813 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-28 15:09:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:09:19,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:19,813 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:19,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2020-10-28 15:09:19,813 INFO L429 AbstractCegarLoop]: === Iteration 99 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:19,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:19,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1563101000, now seen corresponding path program 17 times [2020-10-28 15:09:19,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:19,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598970918] [2020-10-28 15:09:19,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:19,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:20,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:20,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:09:20,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:20,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 573 [2020-10-28 15:09:20,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:20,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:20,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:09:20,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:20,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:09:20,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:20,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:20,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:20,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:20,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:20,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:20,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:20,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:20,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:20,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:20,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:20,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:20,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:09:21,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598970918] [2020-10-28 15:09:21,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:21,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:09:21,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584407257] [2020-10-28 15:09:21,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:09:21,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:21,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:09:21,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:09:21,003 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 22 states. [2020-10-28 15:09:23,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:23,823 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2020-10-28 15:09:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:09:23,824 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-28 15:09:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:23,826 INFO L225 Difference]: With dead ends: 111 [2020-10-28 15:09:23,826 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 15:09:23,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:09:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 15:09:23,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 51. [2020-10-28 15:09:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 15:09:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-28 15:09:23,929 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 31 [2020-10-28 15:09:23,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:23,929 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-28 15:09:23,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:09:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-28 15:09:23,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:09:23,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:23,930 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:23,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2020-10-28 15:09:23,930 INFO L429 AbstractCegarLoop]: === Iteration 100 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:23,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:23,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1145022365, now seen corresponding path program 81 times [2020-10-28 15:09:23,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:23,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288020128] [2020-10-28 15:09:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:23,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:24,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:24,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:09:24,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:24,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 622 [2020-10-28 15:09:24,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:24,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:24,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 15:09:24,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:24,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 15:09:24,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:26,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:26,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:26,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:26,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:26,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:26,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:26,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:26,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:26,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:26,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:26,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:26,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:26,134 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 15:09:26,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288020128] [2020-10-28 15:09:26,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:26,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 15:09:26,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522791688] [2020-10-28 15:09:26,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 15:09:26,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 15:09:26,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:09:26,135 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 24 states. [2020-10-28 15:09:28,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:28,205 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-28 15:09:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:09:28,206 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-28 15:09:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:28,207 INFO L225 Difference]: With dead ends: 66 [2020-10-28 15:09:28,207 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 15:09:28,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=153, Invalid=1739, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 15:09:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 15:09:28,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2020-10-28 15:09:28,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 15:09:28,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-10-28 15:09:28,335 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 32 [2020-10-28 15:09:28,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:28,335 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-10-28 15:09:28,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 15:09:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-10-28 15:09:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:09:28,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:28,335 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:28,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2020-10-28 15:09:28,336 INFO L429 AbstractCegarLoop]: === Iteration 101 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:28,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1936815132, now seen corresponding path program 82 times [2020-10-28 15:09:28,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:28,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82283500] [2020-10-28 15:09:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:28,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:28,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:28,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:28,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:09:28,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:28,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-28 15:09:28,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:28,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:28,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:09:28,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:28,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:09:28,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:29,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:29,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:29,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:29,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:29,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:29,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:29,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:29,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:29,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:29,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:29,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:29,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:09:29,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82283500] [2020-10-28 15:09:29,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:29,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:09:29,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971054601] [2020-10-28 15:09:29,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:09:29,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:29,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:09:29,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:09:29,512 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 23 states. [2020-10-28 15:09:32,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:32,496 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-28 15:09:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 15:09:32,497 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2020-10-28 15:09:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:32,498 INFO L225 Difference]: With dead ends: 78 [2020-10-28 15:09:32,498 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 15:09:32,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=227, Invalid=2323, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 15:09:32,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states.